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Edit detail for #431 exponentiation wrong in 'LODO' revision 6 of 6

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Editor: alfredo
Time: 2008/10/16 13:01:39 GMT-7
Note:

added:

From alfredo Thu Oct 16 13:01:39 -0700 2008
From: alfredo
Date: Thu, 16 Oct 2008 13:01:39 -0700
Subject: 
Message-ID: <20081016130139-0700@axiom-wiki.newsynthesis.org>

Status: fixed somewhere => fix proposed 


Submitted by : kratt6 at: 2008-08-29T05:18:31-07:00 (16 years ago)
Name :
Axiom Version :
Category : Severity : Status :
Optional subject :  
Optional comment :

fricas
(1) -> Dx: LODO(EXPR INT, f+->D(f,x)) := D();
Type: LinearOrdinaryDifferentialOperator?(Expression(Integer),theMap(*1;anonymousFunction;0;initial;internal))
fricas
u := operator 'u;
Type: BasicOperator?
fricas
L := Dx + u(x);
Type: LinearOrdinaryDifferentialOperator?(Expression(Integer),theMap(*1;anonymousFunction;0;initial;internal))
fricas
L**2 = L*L
There are no library operations named ** Use HyperDoc Browse or issue )what op ** to learn if there is any operation containing " ** " in its name.
Cannot find a definition or applicable library operation named ** with argument type(s) LinearOrdinaryDifferentialOperator(Expression(Integer),theMap(*1;anonymousFunction;0;initial;internal)) PositiveInteger
Perhaps you should use "@" to indicate the required return type, or "$" to specify which version of the function you need.

or

fricas
)cl 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. f: INT->INT:=x+->x+1

\label{eq1}\mbox{theMap (...)}(1)
Type: (Integer -> Integer)
fricas
K := OREUP(x, INT, 1, f);
Type: Type
fricas
L := x::K+1;
Type: UnivariateSkewPolynomial?(x,Integer,R -> R,theMap(*1;anonymousFunction;1;initial;internal))
fricas
L^2=L*L

\label{eq2}{{{x}^{2}}+{4 \  x}+ 3}={{{x}^{2}}+{4 \  x}+ 3}(2)
Type: Equation(UnivariateSkewPolynomial?(x,Integer,R -> R,theMap(*1;anonymousFunction;1;initial;internal)))

Reason is, that exponentiation is not taken from Monoid, but from SUP.

Martin

fixed in FriCAS revision 346 --kratt6, Sun, 31 Aug 2008 03:55:56 -0700 reply
Status: open => fixed somewhere

From Fricas --alfredo, Thu, 16 Oct 2008 13:01:25 -0700 reply
http://fricas.svn.sourceforge.net/viewvc/fricas/trunk/src/algebra/ore.spad.pamphlet?r1=257&r2=346&view=patch

Status: fixed somewhere => fix proposed