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last edited 2 years ago by pagani

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Editor: Bill Page Time: 2007/09/27 16:25:39 GMT-7
Note: Pfaffian

added:
[SandBox Pfaffian] -- Computing the Pfaffian of a square matrix

This is the front page of the SandBox?. You can try anything you like here but keep in mind that other people are also using these pages to learn and experiment with Axiom and Reduce. Please be curteous to others if you correct mistakes and try to explain what you are doing.

No Email Notices

Normally, if you edit any page on MathAction? and click Save or if you add a comment to a page, a notice of the change is sent out to all subscribers on the axiom-developer email list, see the [Axiom Community]?. Separate notices are also sent to those users who subscribe directly to MathAction?.

Use Preview

If you click Preview instead of Save, you will get a chance to see the result of your calculations and LaTeX? commands but no email notice is sent out and the result is not saved until you decide to click Save or not.

Use the SandBox

On this page or on any other page with a name beginning with SandBox? such as SandBoxJohn2?, SandBoxSimple?, SandBoxEtc?, clicking Save only sends email notices to users who subscribe directly to that specific SandBox? page. Saving and adding comments does not create an email to the email list. You can safely use these pages for testing without disturbing anyone who might not care to know about your experiments.

New SandBox Pages

You can also create new SandBox? pages as needed just by editing this page and adding a link to the list of new page below. The link must include at least two uppercase letters and no spaces or alternatively it can be any phrase written inside [ ] brackets as long as it begins with SandBox?. When you Save this page, the link to the new page will appear with a blue question mark ? beside it. Clicking on the blue question mark ? will ask you if you wish to create a new page.

[SandBox Aldor Foreign]?: Using Aldor to call external C routines
[SandBox Aldor Generator]?: Aldor defines a generator for type Vector
[SandBox Aldor Sieve]?: A prime number sieve in Aldor to count primes <= n.
[SandBox Aldor Testing]?: Using Aldor to write Axiom library routines
[SandBox Arrays]?: How fast is array access in Axiom?
[SandBox Axiom Syntax]?: Syntax of if then else

[SandboxBiblography]?

[SandBox Boolean]?: evaluating Boolean expressions and conditions
[SandBox Cast]?: Meaning and use of pretend vs. strong typing
[SandBox Categorical Relativity]?: Special relativity without the Lorentz group
[SandBox Category of Graphs]?: Graph theory in Axiom
[SandBox CL-WEB]?: Tangle operation for literate programming implemented in Common Lisp
[SandBox Combinat]?: A{ld,xi}o{r,m}Combinat
[SandBox Content MathML]?: Content vs. presentation MathML?

SandBoxCS224?

[SandBox Direct Product]?: A x B
[SandBox DistributedExpression]?: expression in sum-of-products form
[SandBox Domains and Types]?: What is the difference?
[AxiomEmacsMode]?: Beginnings of an Emacs mode for Axiom based off of Jay's work and others
[SandBox Embeded PDF]?: pdf format documents can be displayed inline
[SandBox EndPaper]?: Algebra and Data Structure Hierarchy (lattice) diagrams
[SandBox Folding]?: experiments with DHTML, javascript, etc.
[SandBox Functional Addition]?: "adding" two functions
[SandBox Functions]?: How do they work?
[SandBox Functors]?: What are they? In Axiom functors are also called domain constructors.
[SandBox Gamma]?: Numerical evaluation of the incomplete Gamma function
[SandBox GuessingSequence]?: Guessing integer sequences
[SandBox Integration]?: Examples of integration in Axiom and Reduce
[SandBox Kernel]?: What is a "kernel"?

[SandBox kaveh]?

[SandBox LaTeX]?: LaTeX? commands allowed in MathAction?
[SandBox Lisp]?: Using Lisp in Axiom
[SandBox Manip]?: expression manipulations
[SandBox Manipulating Domains]?: testing the domain of an expression
[SandBox Mapping]?: A->B is a type in Axiom

[MathMLFormat]?

[SandBox Matrix]?: Examples of working with matrices in Axiom
[SandBox Maxima]?: Testing the Maxima interface
[SandBox Monoid]?: Rings and things
[SandBox Monoid Extend]?: Martin Rubey's beautiful idea about using extend to add a category to a previously defined domain.
[SandBox Noncommutative Polynomials]?: XPOLY and friends
[SandBox Numerical Integration]?: Simpson method
[SandBox NNI]?: NonNegative? Integer without using SubDomain?
[SandBox Pamphlet]?: [Literate Programming]? support on MathAction?
[SandBoxPartialFraction]?: Trigonometric expansion example
[SandBox Pfaffian]?: Computing the Pfaffian of a square matrix
[SandBox Polymake]?: an interface between Axiom and PolyMake?
[SandBox Polynomials]?: Axiom's polynomial domains are certainly rich and complex!
[SandBox ProblemSolving]?: Test page for educational purposes
[SandBox Qubic]?: Solving cubic polynomials
[SandBox Reduce And MathML]?: Reduce can use MathML? for both input and output
[SandBoxRelativeVelocity]?: Slides for IARD 2006: Addition of Relative Velocites is Associative
[SandBox RenameTitle]?: trying to re-create a crash due to renaming pages
[SandBox Sage]?: This is a test of Sage in MathAction?
[SandBox Shortcoming]?: Implementation of solve
[SandBox Solve]?: Solving equations
[SandBox Statistics]?: calculating statistics in Axiom
[SandBox SubDomain]?: What is a SubDomain??
[SandBox Tail Recursion]?: When does Axiom replace recursion with iteration?
[SandBox Text Files]?: How to access text files in Axiom
[SandBox Trace Analysed]?: Tracing can affect output of 1::EXPR INT or 1::FRAC INT
[SandBox Tuples Products and Records]?: Basic structured data types in Axiom
[SandBox Units and Dimensions]?: Scientific units and dimensions
[SandBox Spad]?: Domain construction
[SandBox Speed]?: Compilation speed

[SandBox Zero]?

[SandBox Axiom Strengths]?

SandBoxJohn2?: Experiments with matrices and various other stuff
SandBox2?: Experiments
SandBox3?: Experiments
SandBox4?: Experiments
SandBox5?: Experiments with GraphViz? and StructuredTables?
SandBox6?: Differential Equations etc.
[SandBox7]?
[SandBox8]?: Here you can create your own SandBox?.
[SandBox9]?: Experiments with JET Bundles

[SandBox10]?

[SandBox DoOps]?: used to run Axiom without actually have to have it installed!

[SandBoxKMG]?

Click on the ? to create a new page. You should also edit this page to include a description and a new empty link for the next person.

Examples

Here is a simple Axiom command:

    \begin{axiom}
    integrate(1/(a+z^3), z=0..1,"noPole")
    \end{axiom}

axiom
integrate(1/(a+z^3), z=0..1,"noPole")

(1)

Type: Union(f1: OrderedCompletion? Expression Integer,...)

And here is a REDUCE command:

  \begin{reduce}
  load_package sfgamma;
  load_package defint;
  int(1/(a+z^3), z,0,1);
  \end{reduce}

  \begin{reduce}
  load_package sfgamma;
  load_package defint;
  int(1/(a+z^3), z,0,1);
  \end{reduce}
<hr />

Common Mistakes

Please review the list of [Common Mistakes]? and the list of [MathAction Problems]? if you are have never used MathAction? before. If you are learning to use Axiom and think that someone must have solved some particular problem before you, check this list of Common [Axiom Problems]?.

szsz --unknown, Wed, 07 Dec 2005 09:11:18 -0600 reply

Works with ASCII text output formatting.

axiom)set output tex off
)set output algebra on

axiomsolve([x^2 + y^2 - 2*(ax*x + ay*y) = l1, x^2 + y^2 - 2*(cx*x + cy*y) = l2],[x,y])
   (2)
   [
         (- 2cy + 2ay)y - l2 + l1
     [x= ------------------------,
                 2cx - 2ax
             2               2               2      2  2
         (4cy  - 8ay cy + 4cx  - 8ax cx + 4ay  + 4ax )y
       + 
                                                            2            2
             (4cy - 4ay)l2 + (- 4cy + 4ay)l1 + (8ax cx - 8ax )cy - 8ay cx
           + 
             8ax ay cx
        *
           y
       + 
           2                        2        2         2
         l2  + (- 2l1 + 4ax cx - 4ax )l2 + l1  + (- 4cx  + 4ax cx)l1
         =
         0
       ]
     ]

Type: List List Equation Fraction Polynomial Integer

But fails with LaTeX?.

axiom)set output tex on
)set output algebra off

0**0 --kratt6, Tue, 03 Jan 2006 05:22:52 -0600 reply

The result of 0**0 depends on the type of '0':

axiom(0::Float)**(0::Float)
   >> Error detected within library code:
   0**0 is undefined

The idea was, that defining as 1 is ok whenever there is no notion of limit. However,

axiom
(0::EXPR INT)**(0::EXPR INT)

(2)

Type: Expression Integer

is not quite in line with this, I think. There has been some discussion on this subject on axiom-developer.

It is easy to change this behaviour, if we know better...

ruleset --unknown, Sun, 29 Jan 2006 13:09:07 -0600 reply

Let's see if the same happens here:

axiomsinCosProducts := rule
  sin (x) * sin (y) == (cos(x-y) - cos(x+y))/2
  cos (x) * cos (y) == (cos(x-y) + cos(x+y))/2
  sin (x) * cos (y) == (sin(x-y) + sin(x+y))/2

(3)

Type: Ruleset(Integer,Integer,Expression Integer)

when typing --Bill Page, Mon, 30 Jan 2006 09:00:02 -0600 reply

When you are typing or when you cut-and-paste commands directly into the Axiom interpreter you must use an underscore character at the end of each incomplete line, and you must use the ( ) syntax instead of identation, like this:

  sinCosProducts := rule (_
  sin (x) * sin (y) == (cos(x-y) - cos(x+y))/2; _
  cos (x) * cos (y) == (cos(x-y) + cos(x+y))/2; _
  sin (x) * cos (y) == (sin(x-y) + sin(x+y))/2)

Alternatively, using a text editor you can enter the commands into a file called, for example sincos.input exactly as in MathActon? above and the use the command:

  )read sincos.input

... --unknown, Sat, 11 Mar 2006 13:19:44 -0600 reply

axiom)lib RINTERPA RINTERP PCDEN GUESS GUESSINT GUESSP
   )library cannot find the file RINTERPA.
   )library cannot find the file RINTERP.
   )library cannot find the file PCDEN.
   )library cannot find the file GUESS.
   )library cannot find the file GUESSINT.
   )library cannot find the file GUESSP.
guess(n, [1, 5, 14, 34, 69, 135, 240, 416, 686, 1106], n+->n, [guessRat], [guessSum, guessProduct, guessOne],2)$GuessInteger
   GuessInteger is not a valid type.

conversion failed --Bill Page, Thu, 23 Mar 2006 22:21:41 -0600 reply

Unknown wrote:

z:=sum(myfn(x),x=1..10) -- This fails, why?

The reason this fails is because Axiom tries to evaluate myfn(x) first. But x is not yet an Integer so Axiom cannot compute myfn(x). I guess you were expecting Axiom to "wait" and not evaluate myfn(x) until after x has been assigned the value 1, right? But Axiom does not work this way.

The solution is to write myfn(x) so that is can be applied to something symbolic like x. For example something this:

axiommyfn(i : Expression Integer) : Expression Integer == i
   Function declaration myfn : Expression Integer -> Expression Integer
      has been added to workspace.

Type: Void

axiom
myfn(x)

axiom

Compiling function myfn with type Expression Integer -> Expression 
      Integer

(4)

Type: Expression Integer

axiom
z:=sum(myfn(x),x=1..10)

(5)

Type: Expression Integer

Any hints for multivariate functions? --Bill (Name omitted), Fri, 24 Mar 2006 21:45:25 -0600 reply

Hi Bill:

Thanks for your quick response. I tried to respond to this earlier, but didn't see it in the sand box, please forgive me if you get multiple copies.

I tried to simplify the code from my original program, and generated a univariate function, however my actual code has a multivariate function, and your excellent hint on the use of the Expression qualifier on the parameter and return type which works great for the univariate function case appears to fail for multivarite functions. Please consider the following example.

axioma(n : Expression Integer, k : Expression Integer, p : Expression Float) : Expression Float == binomial(n,k) * p**(k) * (1.0-p)**(n-k)
   Function declaration a : (Expression Integer,Expression Integer,
      Expression Float) -> Expression Float has been added to 
      workspace.

Type: Void

axiom
output(a(4,3,0.25)) -- see that the function actually evaluates for sensible values

axiom

Compiling function a with type (Expression Integer,Expression 
      Integer,Expression Float) -> Expression Float 
   0.046875

Type: Void

axiomz := sum(a(4,i,0.25), i=1..3) --- this fails
   There are 6 exposed and 2 unexposed library operations named sum 
      having 2 argument(s) but none was determined to be applicable. 
      Use HyperDoc Browse, or issue
                               )display op sum
      to learn more about the available operations. Perhaps 
      package-calling the operation or using coercions on the arguments
      will allow you to apply the operation.
   Cannot find a definition or applicable library operation named sum 
      with argument type(s) 
                              Expression Float
                       SegmentBinding PositiveInteger
      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.
output(z)
   55

Type: Void

I did notice in the Axiom online book, chapter 6.6, around page 241, the recommendation to use untyped functions, which appears to allow Axiom to do inference on parameter and result type.

axiom
b(n, k, p) == binomial(n,k) * p**(k) * (1.0-p)**(n-k)

Type: Void

axiom
output(b(4,3,0.25)) -- see that the function actually evaluates for sensible values

axiom

Compiling function b with type (PositiveInteger,PositiveInteger,
      Float) -> Float 
   0.046875

Type: Void

axiom
z := sum(b(4,i,0.25), i=1..3) --- this fails

axiom

Compiling function b with type (PositiveInteger,Variable i,Float)
       -> Expression Float 
   There are 6 exposed and 2 unexposed library operations named sum 
      having 2 argument(s) but none was determined to be applicable. 
      Use HyperDoc Browse, or issue
                               )display op sum
      to learn more about the available operations. Perhaps 
      package-calling the operation or using coercions on the arguments
      will allow you to apply the operation.
   Cannot find a definition or applicable library operation named sum 
      with argument type(s) 
                              Expression Float
                       SegmentBinding PositiveInteger
      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.
output(z)
   55

Type: Void

For univariate functions the approach

axiom
c(k) == binomial(4,k) * 0.25**k * (1.0 - 0.25)**(4-k) -- This approach is only a test, but is not suitable for my program

Type: Void

axiom
output(c(3)) -- test to see if function can be evaluated for sensible arguments

axiom

Compiling function c with type PositiveInteger -> Float 
   0.046875

Type: Void

axiom
z := sum(c(i), i=1..3) -- still doesn't work

axiom

Compiling function c with type Variable i -> Expression Float 
   There are 6 exposed and 2 unexposed library operations named sum 
      having 2 argument(s) but none was determined to be applicable. 
      Use HyperDoc Browse, or issue
                               )display op sum
      to learn more about the available operations. Perhaps 
      package-calling the operation or using coercions on the arguments
      will allow you to apply the operation.
   Cannot find a definition or applicable library operation named sum 
      with argument type(s) 
                              Expression Float
                       SegmentBinding PositiveInteger
      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.
output(z)
   55

Type: Void

But interestingly something like

axiom
d(k) == 1.5 * k -- coerce uotput to be a Float

Type: Void

axiom
z := sum(d(i), i=1..3) -- This works!

axiom

Compiling function d with type Variable i -> Polynomial Float

(6)

Type: Fraction Polynomial Float

axiomoutput(z)
   9.0

Type: Void

Bill, thanks again for your quick help, unforutnatly I lack a local Axiom expert, any ideas would really be welcome here.

reduce(+,[...]?) = sum(...) --billpage, Sat, 25 Mar 2006 16:01:07 -0600 reply

Try this

axiom
z := reduce(+,[b(4,i,0.25) for  i in 1..3])

(7)

Type: Float

Handling the result from functions returning a matrix --Bill (Name omitted), Mon, 27 Mar 2006 08:10:26 -0600 reply

Hi all:

Thanks Bill Page for your help, it is much appreciated (although I used a for loop and not reduce :-)).

I'm having a bit of difficulty getting a Function returning a matrix to work as expected, perhaps it is just cockpit error, but I don't see the error of my ways.

axiomCFM(Q : Matrix(Float)): Matrix(Float) ==
   x := nrows(Q)
   MyIdentityMatrix : Matrix(Float) := new(x, x, 0)
   for i in 1..nrows(MyIdentityMatrix) repeat
      MyIdnetityMatrix(i,i) := 1.0
   Ninv := MyIdnetityMatrix - Q
   N := inverse(Ninv)
   N
   Function declaration CFM : Matrix Float -> Matrix Float has been 
      added to workspace.

Type: Void

axiom--test ComputeFundamentalMatrix
X := matrix[[0, 0.5, 0],[0.5, 0, 0.5],[0, 0.5, 0]]

(8)

Type: Matrix Float

axiomoutput(X)
   +0.0  0.5  0.0+
   |             |
   |0.5  0.0  0.5|
   |             |
   +0.0  0.5  0.0+

Type: Void

axiomN := CFM(X)
   The form on the left hand side of an assignment must be a single 
      variable, a Tuple of variables or a reference to an entry in an 
      object supporting the setelt operation.
output(N)
   N

Type: Void

Any ideas where I'm blowing it here? I tried explicitly setting N to be a Matrix type but that failed too.

axiomCFM(Q : Matrix(Float)): Matrix(Float) ==
   x := nrows(Q)
   MyIdentityMatrix : Matrix(Float) := new(x, x, 0)
   for i in 1..nrows(MyIdentityMatrix) repeat
      MyIdnetityMatrix(i,i) := 1.0
   Ninv := MyIdnetityMatrix - Q
   N := inverse(Ninv)
   N
   Function declaration CFM : Matrix Float -> Matrix Float has been 
      added to workspace.
   Compiled code for CFM has been cleared.
   1 old definition(s) deleted for function or rule CFM

Type: Void

axiom--test ComputeFundamentalMatrix
X := matrix[[0, 0.5, 0],[0.5, 0, 0.5],[0, 0.5, 0]]

(9)

Type: Matrix Float

axiomoutput(X)
   +0.0  0.5  0.0+
   |             |
   |0.5  0.0  0.5|
   |             |
   +0.0  0.5  0.0+

Type: Void

axiomN : Matrix(Float) := CFM(X)
   The form on the left hand side of an assignment must be a single 
      variable, a Tuple of variables or a reference to an entry in an 
      object supporting the setelt operation.
output(N)
   N is declared as being in Matrix Float but has not been given a 
      value.

Thanks again for all your help.

Regards:

Bill M. (Sorry, my unique last name attracts too much spam).

typo and identity --billpage, Mon, 27 Mar 2006 09:34:35 -0600 reply

although I used a for loop and not reduce :-)

Good thinking. ;)

You have a simple typographical error. You have written both:

  MyIdentityMatrix

and :

  MyIdnetityMatrix

BTW, instead of the complicated construction of the identify matrix you should just write:

  Ninv := 1 - Q

For matrices 1 denotes the identity.

... --unknown, Sat, 08 Apr 2006 10:45:29 -0500 reply

axiom)set output tex off
)set output algebra on
FunFun := x**4 - 6* x**3 + 11* x*x + 2* x + 1
          4     3      2
   (28)  x  - 6x  + 11x  + 2x + 1

Type: Polynomial Integer

axiomradicalSolve(FunFun)
   (29)
   [
     x =
           -
              ROOT
                              +---------------------+2
                              |     +-+       +----+
                              |2069\|3  + 144\|- 79
                         - 9  |---------------------
                             3|           +-+
                             \|        27\|3
                       + 
                             +---------------------+
                             |     +-+       +----+
                             |2069\|3  + 144\|- 79
                         30  |--------------------- - 169
                            3|           +-+
                            \|        27\|3
                    *
                       ROOT
                                 +---------------------+2
                                 |     +-+       +----+
                                 |2069\|3  + 144\|- 79
                              9  |---------------------
                                3|           +-+
                                \|        27\|3
                            + 
                                  +---------------------+
                                  |     +-+       +----+
                                  |2069\|3  + 144\|- 79
                              15  |--------------------- + 169
                                 3|           +-+
                                 \|        27\|3
                         /
                               +---------------------+
                               |     +-+       +----+
                               |2069\|3  + 144\|- 79
                            9  |---------------------
                              3|           +-+
                              \|        27\|3
                   + 
                            +---------------------+
                            |     +-+       +----+
                            |2069\|3  + 144\|- 79
                     - 144  |---------------------
                           3|           +-+
                           \|        27\|3
                /
                        +---------------------+
                        |     +-+       +----+
                        |2069\|3  + 144\|- 79
                     9  |---------------------
                       3|           +-+
                       \|        27\|3
                  *
                     ROOT
                               +---------------------+2
                               |     +-+       +----+
                               |2069\|3  + 144\|- 79
                            9  |---------------------
                              3|           +-+
                              \|        27\|3
                          + 
                                +---------------------+
                                |     +-+       +----+
                                |2069\|3  + 144\|- 79
                            15  |--------------------- + 169
                               3|           +-+
                               \|        27\|3
                       /
                             +---------------------+
                             |     +-+       +----+
                             |2069\|3  + 144\|- 79
                          9  |---------------------
                            3|           +-+
                            \|        27\|3
         + 
            +-------------------------------------------------------------+
            |   +---------------------+2      +---------------------+
            |   |     +-+       +----+        |     +-+       +----+
            |   |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
            |9  |---------------------  + 15  |--------------------- + 169
            |  3|           +-+              3|           +-+
            |  \|        27\|3               \|        27\|3
            |-------------------------------------------------------------  + 3
            |                     +---------------------+
            |                     |     +-+       +----+
            |                     |2069\|3  + 144\|- 79
            |                  9  |---------------------
            |                    3|           +-+
           \|                    \|        27\|3
      /
         2
     ,
     x =
           ROOT
                           +---------------------+2      +---------------------+
                           |     +-+       +----+        |     +-+       +----+
                           |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
                      - 9  |---------------------  + 30  |---------------------
                          3|           +-+              3|           +-+
                          \|        27\|3               \|        27\|3
                    + 
                      - 169
                 *
                    ROOT
                              +---------------------+2
                              |     +-+       +----+
                              |2069\|3  + 144\|- 79
                           9  |---------------------
                             3|           +-+
                             \|        27\|3
                         + 
                               +---------------------+
                               |     +-+       +----+
                               |2069\|3  + 144\|- 79
                           15  |--------------------- + 169
                              3|           +-+
                              \|        27\|3
                      /
                            +---------------------+
                            |     +-+       +----+
                            |2069\|3  + 144\|- 79
                         9  |---------------------
                           3|           +-+
                           \|        27\|3
                + 
                         +---------------------+
                         |     +-+       +----+
                         |2069\|3  + 144\|- 79
                  - 144  |---------------------
                        3|           +-+
                        \|        27\|3
             /
                     +---------------------+
                     |     +-+       +----+
                     |2069\|3  + 144\|- 79
                  9  |---------------------
                    3|           +-+
                    \|        27\|3
               *
                 +-------------------------------------------------------------+
                 |   +---------------------+2      +---------------------+
                 |   |     +-+       +----+        |     +-+       +----+
                 |   |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
                 |9  |---------------------  + 15  |--------------------- + 169
                 |  3|           +-+              3|           +-+
                 |  \|        27\|3               \|        27\|3
                 |-------------------------------------------------------------
                 |                     +---------------------+
                 |                     |     +-+       +----+
                 |                     |2069\|3  + 144\|- 79
                 |                  9  |---------------------
                 |                    3|           +-+
                \|                    \|        27\|3
         + 
            +-------------------------------------------------------------+
            |   +---------------------+2      +---------------------+
            |   |     +-+       +----+        |     +-+       +----+
            |   |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
            |9  |---------------------  + 15  |--------------------- + 169
            |  3|           +-+              3|           +-+
            |  \|        27\|3               \|        27\|3
            |-------------------------------------------------------------  + 3
            |                     +---------------------+
            |                     |     +-+       +----+
            |                     |2069\|3  + 144\|- 79
            |                  9  |---------------------
            |                    3|           +-+
           \|                    \|        27\|3
      /
         2
     ,
     x =
           -
              ROOT
                              +---------------------+2
                              |     +-+       +----+
                              |2069\|3  + 144\|- 79
                         - 9  |---------------------
                             3|           +-+
                             \|        27\|3
                       + 
                             +---------------------+
                             |     +-+       +----+
                             |2069\|3  + 144\|- 79
                         30  |--------------------- - 169
                            3|           +-+
                            \|        27\|3
                    *
                       ROOT
                                 +---------------------+2
                                 |     +-+       +----+
                                 |2069\|3  + 144\|- 79
                              9  |---------------------
                                3|           +-+
                                \|        27\|3
                            + 
                                  +---------------------+
                                  |     +-+       +----+
                                  |2069\|3  + 144\|- 79
                              15  |--------------------- + 169
                                 3|           +-+
                                 \|        27\|3
                         /
                               +---------------------+
                               |     +-+       +----+
                               |2069\|3  + 144\|- 79
                            9  |---------------------
                              3|           +-+
                              \|        27\|3
                   + 
                          +---------------------+
                          |     +-+       +----+
                          |2069\|3  + 144\|- 79
                     144  |---------------------
                         3|           +-+
                         \|        27\|3
                /
                        +---------------------+
                        |     +-+       +----+
                        |2069\|3  + 144\|- 79
                     9  |---------------------
                       3|           +-+
                       \|        27\|3
                  *
                     ROOT
                               +---------------------+2
                               |     +-+       +----+
                               |2069\|3  + 144\|- 79
                            9  |---------------------
                              3|           +-+
                              \|        27\|3
                          + 
                                +---------------------+
                                |     +-+       +----+
                                |2069\|3  + 144\|- 79
                            15  |--------------------- + 169
                               3|           +-+
                               \|        27\|3
                       /
                             +---------------------+
                             |     +-+       +----+
                             |2069\|3  + 144\|- 79
                          9  |---------------------
                            3|           +-+
                            \|        27\|3
         + 
            +-------------------------------------------------------------+
            |   +---------------------+2      +---------------------+
            |   |     +-+       +----+        |     +-+       +----+
            |   |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
            |9  |---------------------  + 15  |--------------------- + 169
            |  3|           +-+              3|           +-+
            |  \|        27\|3               \|        27\|3
         -  |-------------------------------------------------------------  + 3
            |                     +---------------------+
            |                     |     +-+       +----+
            |                     |2069\|3  + 144\|- 79
            |                  9  |---------------------
            |                    3|           +-+
           \|                    \|        27\|3
      /
         2
     ,
     x =
           ROOT
                           +---------------------+2      +---------------------+
                           |     +-+       +----+        |     +-+       +----+
                           |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
                      - 9  |---------------------  + 30  |---------------------
                          3|           +-+              3|           +-+
                          \|        27\|3               \|        27\|3
                    + 
                      - 169
                 *
                    ROOT
                              +---------------------+2
                              |     +-+       +----+
                              |2069\|3  + 144\|- 79
                           9  |---------------------
                             3|           +-+
                             \|        27\|3
                         + 
                               +---------------------+
                               |     +-+       +----+
                               |2069\|3  + 144\|- 79
                           15  |--------------------- + 169
                              3|           +-+
                              \|        27\|3
                      /
                            +---------------------+
                            |     +-+       +----+
                            |2069\|3  + 144\|- 79
                         9  |---------------------
                           3|           +-+
                           \|        27\|3
                + 
                       +---------------------+
                       |     +-+       +----+
                       |2069\|3  + 144\|- 79
                  144  |---------------------
                      3|           +-+
                      \|        27\|3
             /
                     +---------------------+
                     |     +-+       +----+
                     |2069\|3  + 144\|- 79
                  9  |---------------------
                    3|           +-+
                    \|        27\|3
               *
                 +-------------------------------------------------------------+
                 |   +---------------------+2      +---------------------+
                 |   |     +-+       +----+        |     +-+       +----+
                 |   |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
                 |9  |---------------------  + 15  |--------------------- + 169
                 |  3|           +-+              3|           +-+
                 |  \|        27\|3               \|        27\|3
                 |-------------------------------------------------------------
                 |                     +---------------------+
                 |                     |     +-+       +----+
                 |                     |2069\|3  + 144\|- 79
                 |                  9  |---------------------
                 |                    3|           +-+
                \|                    \|        27\|3
         + 
            +-------------------------------------------------------------+
            |   +---------------------+2      +---------------------+
            |   |     +-+       +----+        |     +-+       +----+
            |   |2069\|3  + 144\|- 79         |2069\|3  + 144\|- 79
            |9  |---------------------  + 15  |--------------------- + 169
            |  3|           +-+              3|           +-+
            |  \|        27\|3               \|        27\|3
         -  |-------------------------------------------------------------  + 3
            |                     +---------------------+
            |                     |     +-+       +----+
            |                     |2069\|3  + 144\|- 79
            |                  9  |---------------------
            |                    3|           +-+
           \|                    \|        27\|3
      /
         2
     ]

Type: List Equation Expression Integer

axiom)set output tex on
)set output algebra off

Matthias

axiom
t:=matrix ([[0,1,1],[1,-2,2],[1,2,-1]])

(10)

Type: Matrix Integer

We cat diagonalise t by finding it's eigenvalues.

axiom)set output tex off
)set output algebra on
e:=radicalEigenvectors(t)
   (31)
   [
                 +-----------------+2     +-----------------+
                 |  +-+    +------+       |  +-+    +------+
                 |3\|3  + \|- 1345        |3\|3  + \|- 1345
              3  |-----------------  - 3  |----------------- + 7
                3|        +-+            3|        +-+
                \|      6\|3             \|      6\|3
     [radval= --------------------------------------------------, radmult= 1,
                                +-----------------+
                                |  +-+    +------+
                                |3\|3  + \|- 1345
                             3  |-----------------
                               3|        +-+
                               \|      6\|3
       radvect =
         [
   [
     [
                     +-----------------+2
                     |  +-+    +------+
                +-+  |3\|3  + \|- 1345
           - 12\|3   |-----------------
                    3|        +-+
                    \|      6\|3
         + 
                                  +-----------------+
                                  |  +-+    +------+
               +-+     +------+   |3\|3  + \|- 1345        +-+     +------+
           (60\|3  + 6\|- 1345 )  |----------------- + 205\|3  + 3\|- 1345
                                 3|        +-+
                                 \|      6\|3
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         126\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
     [
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
           6\|3   |-----------------
                 3|        +-+
                 \|      6\|3
         + 
                                   +-----------------+
                                   |  +-+    +------+
                +-+     +------+   |3\|3  + \|- 1345       +-+     +------+
           (117\|3  - 3\|- 1345 )  |----------------- - 71\|3  + 9\|- 1345
                                  3|        +-+
                                  \|      6\|3
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         126\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
    [1]]
           ]
       ]
     ,
     [
       radval =
                              +-----------------+2
                              |  +-+    +------+
                  +---+       |3\|3  + \|- 1345
             (- 3\|- 3  - 3)  |-----------------
                             3|        +-+
                             \|      6\|3
           + 
                              +-----------------+
                              |  +-+    +------+
                  +---+       |3\|3  + \|- 1345
             (- 3\|- 3  + 3)  |----------------- + 14
                             3|        +-+
                             \|      6\|3
        /
                          +-----------------+
                          |  +-+    +------+
              +---+       |3\|3  + \|- 1345
           (3\|- 3  - 3)  |-----------------
                         3|        +-+
                         \|      6\|3
       ,
      radmult= 1,
       radvect =
         [
   [
     [
                     +-----------------+2
                     |  +-+    +------+
                +-+  |3\|3  + \|- 1345
           - 24\|3   |-----------------
                    3|        +-+
                    \|      6\|3
         + 
                    +---+       +-+     +------+ +---+     +------+
             ((- 60\|- 3  - 60)\|3  - 6\|- 1345 \|- 3  - 6\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
                +---+        +-+     +------+ +---+     +------+
           (205\|- 3  - 205)\|3  + 3\|- 1345 \|- 3  - 3\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
     [
                   +-----------------+2
                   |  +-+    +------+
              +-+  |3\|3  + \|- 1345
           12\|3   |-----------------
                  3|        +-+
                  \|      6\|3
         + 
                     +---+        +-+     +------+ +---+     +------+
             ((- 117\|- 3  - 117)\|3  + 3\|- 1345 \|- 3  + 3\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
                 +---+       +-+     +------+ +---+     +------+
           (- 71\|- 3  + 71)\|3  + 9\|- 1345 \|- 3  - 9\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
    [1]]
           ]
       ]
     ,
     [
       radval =
                              +-----------------+2
                              |  +-+    +------+
                  +---+       |3\|3  + \|- 1345
             (- 3\|- 3  + 3)  |-----------------
                             3|        +-+
                             \|      6\|3
           + 
                              +-----------------+
                              |  +-+    +------+
                  +---+       |3\|3  + \|- 1345
             (- 3\|- 3  - 3)  |----------------- - 14
                             3|        +-+
                             \|      6\|3
        /
                          +-----------------+
                          |  +-+    +------+
              +---+       |3\|3  + \|- 1345
           (3\|- 3  + 3)  |-----------------
                         3|        +-+
                         \|      6\|3
       ,
      radmult= 1,
       radvect =
         [
   [
     [
                     +-----------------+2
                     |  +-+    +------+
                +-+  |3\|3  + \|- 1345
           - 24\|3   |-----------------
                    3|        +-+
                    \|      6\|3
         + 
                  +---+       +-+     +------+ +---+     +------+
             ((60\|- 3  - 60)\|3  + 6\|- 1345 \|- 3  - 6\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
                  +---+        +-+     +------+ +---+     +------+
           (- 205\|- 3  - 205)\|3  - 3\|- 1345 \|- 3  - 3\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
     [
                   +-----------------+2
                   |  +-+    +------+
              +-+  |3\|3  + \|- 1345
           12\|3   |-----------------
                  3|        +-+
                  \|      6\|3
         + 
                   +---+        +-+     +------+ +---+     +------+
             ((117\|- 3  - 117)\|3  - 3\|- 1345 \|- 3  + 3\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
               +---+       +-+     +------+ +---+     +------+
           (71\|- 3  + 71)\|3  - 9\|- 1345 \|- 3  - 9\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
    [1]]
           ]
       ]
     ]

Type: List Record(radval: Expression Integer,radmult: Integer,radvect: List Matrix Expression Integer)

axiomd:=diagonalMatrix([e.1.radval,e.2.radval,e.3.radval])
   Function definition for d is being overwritten.
   Compiled code for d has been cleared.
   (32)
        +-----------------+2     +-----------------+
        |  +-+    +------+       |  +-+    +------+
        |3\|3  + \|- 1345        |3\|3  + \|- 1345
     3  |-----------------  - 3  |----------------- + 7
       3|        +-+            3|        +-+
       \|      6\|3             \|      6\|3
   [[--------------------------------------------------,0,0],
                       +-----------------+
                       |  +-+    +------+
                       |3\|3  + \|- 1345
                    3  |-----------------
                      3|        +-+
                      \|      6\|3
     [0,
                            +-----------------+2
                            |  +-+    +------+
                +---+       |3\|3  + \|- 1345
           (- 3\|- 3  - 3)  |-----------------
                           3|        +-+
                           \|      6\|3
         + 
                            +-----------------+
                            |  +-+    +------+
                +---+       |3\|3  + \|- 1345
           (- 3\|- 3  + 3)  |----------------- + 14
                           3|        +-+
                           \|      6\|3
      /
                        +-----------------+
                        |  +-+    +------+
            +---+       |3\|3  + \|- 1345
         (3\|- 3  - 3)  |-----------------
                       3|        +-+
                       \|      6\|3
       ,
      0]
     ,
     [0, 0,
                            +-----------------+2
                            |  +-+    +------+
                +---+       |3\|3  + \|- 1345
           (- 3\|- 3  + 3)  |-----------------
                           3|        +-+
                           \|      6\|3
         + 
                            +-----------------+
                            |  +-+    +------+
                +---+       |3\|3  + \|- 1345
           (- 3\|- 3  - 3)  |----------------- - 14
                           3|        +-+
                           \|      6\|3
      /
                        +-----------------+
                        |  +-+    +------+
            +---+       |3\|3  + \|- 1345
         (3\|- 3  + 3)  |-----------------
                       3|        +-+
                       \|      6\|3
       ]
     ]

Type: Matrix Expression Integer

Now prove it by constructing the simularity transformation from the eigenvectors:

axiomp:=horizConcat(horizConcat(e.1.radvect.1,e.2.radvect.1),e.3.radvect.1)
   (33)
   [
     [
                     +-----------------+2
                     |  +-+    +------+
                +-+  |3\|3  + \|- 1345
           - 12\|3   |-----------------
                    3|        +-+
                    \|      6\|3
         + 
                                  +-----------------+
                                  |  +-+    +------+
               +-+     +------+   |3\|3  + \|- 1345        +-+     +------+
           (60\|3  + 6\|- 1345 )  |----------------- + 205\|3  + 3\|- 1345
                                 3|        +-+
                                 \|      6\|3
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         126\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ,
                     +-----------------+2
                     |  +-+    +------+
                +-+  |3\|3  + \|- 1345
           - 24\|3   |-----------------
                    3|        +-+
                    \|      6\|3
         + 
                    +---+       +-+     +------+ +---+     +------+
             ((- 60\|- 3  - 60)\|3  - 6\|- 1345 \|- 3  - 6\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
                +---+        +-+     +------+ +---+     +------+
           (205\|- 3  - 205)\|3  + 3\|- 1345 \|- 3  - 3\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ,
                     +-----------------+2
                     |  +-+    +------+
                +-+  |3\|3  + \|- 1345
           - 24\|3   |-----------------
                    3|        +-+
                    \|      6\|3
         + 
                  +---+       +-+     +------+ +---+     +------+
             ((60\|- 3  - 60)\|3  + 6\|- 1345 \|- 3  - 6\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
                  +---+        +-+     +------+ +---+     +------+
           (- 205\|- 3  - 205)\|3  - 3\|- 1345 \|- 3  - 3\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
     [
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
           6\|3   |-----------------
                 3|        +-+
                 \|      6\|3
         + 
                                   +-----------------+
                                   |  +-+    +------+
                +-+     +------+   |3\|3  + \|- 1345       +-+     +------+
           (117\|3  - 3\|- 1345 )  |----------------- - 71\|3  + 9\|- 1345
                                  3|        +-+
                                  \|      6\|3
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         126\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ,
                   +-----------------+2
                   |  +-+    +------+
              +-+  |3\|3  + \|- 1345
           12\|3   |-----------------
                  3|        +-+
                  \|      6\|3
         + 
                     +---+        +-+     +------+ +---+     +------+
             ((- 117\|- 3  - 117)\|3  + 3\|- 1345 \|- 3  + 3\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
                 +---+       +-+     +------+ +---+     +------+
           (- 71\|- 3  + 71)\|3  + 9\|- 1345 \|- 3  - 9\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ,
                   +-----------------+2
                   |  +-+    +------+
              +-+  |3\|3  + \|- 1345
           12\|3   |-----------------
                  3|        +-+
                  \|      6\|3
         + 
                   +---+        +-+     +------+ +---+     +------+
             ((117\|- 3  - 117)\|3  - 3\|- 1345 \|- 3  + 3\|- 1345 )
          *
              +-----------------+
              |  +-+    +------+
              |3\|3  + \|- 1345
              |-----------------
             3|        +-+
             \|      6\|3
         + 
               +---+       +-+     +------+ +---+     +------+
           (71\|- 3  + 71)\|3  - 9\|- 1345 \|- 3  - 9\|- 1345
      /
                  +-----------------+2
                  |  +-+    +------+
             +-+  |3\|3  + \|- 1345
         252\|3   |-----------------
                 3|        +-+
                 \|      6\|3
       ]
     ,
    [1,1,1]]

Type: Matrix Expression Integer

axiomp*d*inverse(p)
         +0   1    1 +
         |           |
   (34)  |1  - 2   2 |
         |           |
         +1   2   - 1+

Type: Matrix Expression Integer

axiom)set output tex on
)set output algebra off

\end{axiom}

Axiom can't integrame exp(x^4) ;( --unknown, Fri, 28 Apr 2006 14:03:28 -0500 reply

Axiom can't integrame exp(x^4) ;(

axiom
integrate(exp(x**4),x)

(11)

Type: Union(Expression Integer,...)

But Maple can...

axiom
f(x) == (1/4)*x*(-Gamma(1/4,-x**4)*Gamma(3/4)+%pi*sqrt(2))/((-x**4)**(1/4)*Gamma(3/4))

Type: Void

axiom
D(f(x),x)

axiom

Compiling function f with type Variable x -> Expression DoubleFloat

(12)

Type: Expression DoubleFloat?

Axiom cannot integrate e^(4*x) --kratt6, Fri, 28 Apr 2006 16:34:16 -0500 reply

This is not a big surprise: note that Gamma(x,y) is not an elementary function.

Martin

... --unknown, Thu, 18 May 2006 11:30:21 -0500 reply

This is both obviously wrong since the integrand is a positive function:

axiom
integrate(1/(1+x^4),x=%minusInfinity..%plusInfinity)

(13)

Type: Union(f1: OrderedCompletion? Expression Integer,...)

axiom
numeric(integrate(1/(1+x^4),x=0..1))

(14)

Type: Float

... --unknown, Wed, 24 May 2006 04:31:40 -0500 reply

axiom)clear co
   All user variables and function definitions have been cleared.
   All )browse facility databases have been cleared.
   Internally cached functions and constructors have been cleared.
   )clear completely is finished.
n := 32

(15)

Type: PositiveInteger?

axiom
y : FARRAY INT := new(n,1)

(16)

Type: FlexibleArray? Integer

axiom
n0 := n

(17)

Type: PositiveInteger?

axiom
n1 := sum(x^1, x=0..n-1)

(18)

Type: Fraction Polynomial Integer

axiom
n2 := sum(x^2, x=0..n-1)

(19)

Type: Fraction Polynomial Integer

axiom
n3 := sum(x^3, x=0..n-1)

(20)

Type: Fraction Polynomial Integer

axiom
n4 := sum(x^4, x=0..n-1)

(21)

Type: Fraction Polynomial Integer

axiomA := matrix([[n4, n3, n2],_
            [n3, n2, n1],_
            [n2, n1, n0]])

(22)

Type: Matrix Fraction Polynomial Integer

axiom
X := vector([x1, x2, x3])

(23)

Type: Vector OrderedVariableList? [x1,x2,x3]?

axiomB := vector([sum(x^2* u, x=0..n-1),_
       sum(x*   v, x=0..n-1),_
       sum(     w, x=0..n-1)])

(24)

Type: Vector Fraction Polynomial Integer

axiomsolve([A * X = B], [x1, x2, x3])
   There are 20 exposed and 3 unexposed library operations named solve 
      having 2 argument(s) but none was determined to be applicable. 
      Use HyperDoc Browse, or issue
                              )display op solve
      to learn more about the available operations. Perhaps 
      package-calling the operation or using coercions on the arguments
      will allow you to apply the operation.
   Cannot find a definition or applicable library operation named solve
      with argument type(s) 
              List Equation Vector Fraction Polynomial Integer
                     List OrderedVariableList [x1,x2,x3]
      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.

can this be correct? --unknown, Tue, 30 May 2006 23:51:26 -0500 reply

axiom
integrate(1/((x+t)*sqrt(1+(x*t)**2)),t=0..%plusInfinity,"noPole")

(25)

Type: Union(f1: OrderedCompletion? Expression Integer,...)

axiom
subst(%,x=1)

(26)

Type: Expression Integer

axiom
integrate(1/((1+t)*sqrt(1+(1*t)**2)),t=0..%plusInfinity,"noPole")

(27)

Type: Union(f1: OrderedCompletion? Expression Integer,...)

axiom
simplify(%-subst((asinh(x^2)+asinh(1/x^2))/sqrt(1+x^4),x=1))

(28)

Type: Expression Integer

axiom
%::Expression Float

(29)

Type: Expression Float

... --unknown, Mon, 03 Jul 2006 02:07:02 -0500 reply

axiom
a := matrix([ [-1,0,0,0,1,0], [0,1,0,0,0,0], [0,0,2,0,0,-2], [0,0,0,4,0,0], [0,0,0,0,3,0], [0,0,-3,0,0,3]])

(30)

Type: Matrix Integer

axiom
determinant(a)

(31)

Type: NonNegativeInteger?

axiom
inverse(a)

(32)

Type: Union("failed",...)

... --unknown, Fri, 07 Jul 2006 11:54:52 -0500 reply

a := matrix([ [-3,1,1,1]?, [1,1,1,1]?, [1,1,1,1]?, [1,1,1,1]]?)

... --unknown, Fri, 07 Jul 2006 13:24:57 -0500 reply

axiom
As := matrix([ [-3,1,1,1], [1,1,1,1], [1,1,1,1], [1,1,1,1]])

(33)

Type: Matrix Integer

axiom
A := subMatrix(As, 2,4,2,4)

(34)

Type: Matrix Integer

axiom
ob := orthonormalBasis(A)

(35)

Type: List Matrix Expression Integer

axiom
P : Matrix(Expression Integer) := new(3,3,0)

(36)

Type: Matrix Expression Integer

axiom
setsubMatrix!(P,1,1,ob.3)

(37)

Type: Matrix Expression Integer

axiom
setsubMatrix!(P,1,2,ob.1)

(38)

Type: Matrix Expression Integer

axiom
setsubMatrix!(P,1,3,ob.2)

(39)

Type: Matrix Expression Integer

axiom
Pt := transpose(P)

(40)

Type: Matrix Expression Integer

axiom
Ps : Matrix(Expression Integer) := new(4,4,0)

(41)

Type: Matrix Expression Integer

axiom
Ps(1,1) := 1

(42)

Type: Expression Integer

axiom
setsubMatrix!(Ps,2,2,P)

(43)

Type: Matrix Expression Integer

axiom
PsT := transpose(Ps)

(44)

Type: Matrix Expression Integer

axiom
PsTAsPs := PsT * As * Ps

(45)

Type: Matrix Expression Integer

axiom
b1 := PsTAsPs(2,1)

(46)

Type: Expression Integer

axiom
l1 := PsTAsPs(2,2)

(47)

Type: Expression Integer

axiom
Us : Matrix(Expression Integer) := new(4,4,0)

(48)

Type: Matrix Expression Integer

axiom
Us(1,1) := 1

(49)

Type: Expression Integer

axiom
Us(2,2) := 1

(50)

Type: Expression Integer

axiom
Us(3,3) := 1

(51)

Type: Expression Integer

axiom
Us(4,4) := 1

(52)

Type: Expression Integer

axiom
Us(2,1) := -b1 / l1

(53)

Type: Expression Integer

axiom
PsUs := Ps * Us

(54)

Type: Matrix Expression Integer

axiom
PsUsT := transpose(PsUs)

(55)

Type: Matrix Expression Integer

axiom
PsUsTAsPsUs := PsUsT * As * PsUs

(56)

Type: Matrix Expression Integer

axiom
C := inverse(PsUs)

(57)

Type: Union(Matrix Expression Integer,...)

axiom
c := PsUsTAsPsUs(1,1)

(58)

Type: Expression Integer

axiom
gQ := PsUsTAsPsUs / c

(59)

Type: Matrix Expression Integer

axiom
x1 := transpose(matrix([[1,2,3,4]]))

(60)

Type: Matrix Integer

axiom
v1 := transpose(x1) * As * x1

(61)

Type: Matrix Integer

axiom
x2 := C * x1

(62)

Type: Matrix Expression Integer

axiom
v2 := transpose(x2) * PsUsTAsPsUs * x2

(63)

Type: Matrix Expression Integer

graphics --unknown, Tue, 01 Aug 2006 02:17:12 -0500 reply

axiomdraw(y**2/2+(x**2-1)**2/4-1=0, x,y, range ==[-2..2, -1..1])
   There are 20 exposed and 18 unexposed library operations named ** 
      having 2 argument(s) but none was determined to be applicable. 
      Use HyperDoc Browse, or issue
                               )display op **
      to learn more about the available operations. Perhaps 
      package-calling the operation or using coercions on the arguments
      will allow you to apply the operation.
   Cannot find a definition or applicable library operation named ** 
      with argument type(s) 
                            FlexibleArray Integer
                               PositiveInteger
      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.

series test --greg, Sat, 03 Feb 2007 09:35:50 -0600 reply

axiom
f1 := taylor(1 - x**2,x = 0)

(64)

Type: UnivariateTaylorSeries?(Expression Integer,x,0)

axiom
asin f1

(65)

Type: UnivariateTaylorSeries?(Expression Integer,x,0)

axiom
sin %

(66)

Type: UnivariateTaylorSeries?(Expression Integer,x,0)

SandboxMSkuce?

axiom
1+1

(67)

Type: PositiveInteger?

integration --jhnbk, Fri, 08 Jun 2007 03:50:35 -0500 reply

axiom
integrate((x-1)/log(x), x)

(68)

Type: Union(Expression Integer,...)

axiom
integrate(x*exp(x)*sin(x),x)

(69)

Type: Union(Expression Integer,...)

Working With Lists --daneshpajouh, Sat, 16 Jun 2007 07:00:00 -0500 reply

axiom
[p for p in primes(2,1000)|(p rem 16)=1]

(70)

Type: List Integer

axiom
[p**2+1 for p in primes(2,100)]

(71)

Type: List Integer

axiomintegrate (2x^2 + 2x, x)
   Cannot find a definition or applicable library operation named 2 
      with argument type(s) 
                                 Variable x
      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.

is it error? --vv, Sat, 28 Jul 2007 14:00:27 -0500 reply

axiomradix(36,37)
   >> Error detected within library code:
   index out of range

Is it error?

(better) example (with axiom markers this time) ;-) --pbwagner, Mon, 10 Sep 2007 13:01:48 -0500 reply

axiom
integrate(log(log(x)),x)

(72)

Type: Union(Expression Integer,...)