MathAction #130 SpecialFunction(Integer) doesn't return Expression Integer

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 - #130 SpecialFunction(Integer) doesn't return Expression Integer <-- You are here.

Original Issue Report

fricas

(1) -> digamma 2

$\label{eq1}digamma \left({2}\right)$

(1)

Type: Expression(Integer)

Has to return digamma(2) (EXPR INT)

Analysis

The statement of the issue is to terse and vague to be sure what the author had in mind, but assuming that s/he expected the result to be of type EXPR INT, here is how to see what is going on. Use the option )set message selection on to trace how Axiom finds the signature of the appropriate digamma function:

fricas

)set message selection on

digamma 2

 Function Selection for digamma
      Arguments: PI 

 [1]  signature:   EXPR(INT) -> EXPR(INT)
      implemented: slot    from EXPR(INT)
 [2]  signature:   FLOAT -> FLOAT
      implemented: slot (Float)(Float) from FSFUN
 [3]  signature:   COMPLEX(DFLOAT) -> COMPLEX(DFLOAT)
      implemented: slot (Complex (DoubleFloat))(Complex (DoubleFloat)) from DFSFUN
 [4]  signature:   COMPLEX(FLOAT) -> COMPLEX(FLOAT)
      implemented: slot (Complex (Float))(Complex (Float)) from FSFUN

$\label{eq2}digamma \left({2}\right)$

(2)

Type: Expression(Integer)

Axiom finds 3 possible signatures and applies the first one because 2 can be coerced to DoubleFloat?. But we can ask Axiom to take the third option by either specifically treating the type of the input 2 as EXPR INT or by asking for something of type EXPR INT as the result.

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digamma(2::EXPR INT)

 Function Selection for digamma
      Arguments: EXPR(INT) 

 [1]  signature:   EXPR(INT) -> EXPR(INT)
      implemented: slot    from EXPR(INT)

$\label{eq3}digamma \left({2}\right)$

(3)

Type: Expression(Integer)

fricas

digamma(2)@(EXPR INT)

 Function Selection for digamma
      Arguments: EXPR(INT) 
      Target type: EXPR(INT) 
   -> no appropriate digamma found in Integer 

 [1]  signature:   EXPR(INT) -> EXPR(INT)
      implemented: slot    from EXPR(INT)

$\label{eq4}digamma \left({2}\right)$

(4)

Type: Expression(Integer)

Of course as something of type EXPR INT this expression has no simplier representation.

this works as documented --Bill Page, Wed, 23 Mar 2005 16:17:27 -0600 reply

Status: open => rejected

Sorry to respond to this but in Axiom, all trigonometric, transcendental etc.. functions is returned in EXPR INT if there is no integer functions. I think that Axiom has to return digamma(2) and digamma(2.0) the SF result. This permit to work directly on expression. You can test some other symbolic CAS.But may be I'm wrong.

PLEASE RESPOND and THANK YOU --Bill Page, Wed, 23 Mar 2005 18:06:05 -0600 reply

Please do not be "sorry to respond" - that is the purpose of this website!

By the way, I think it would be polite (but it is not necessary) for you identify yourself by clicking on preferences rather than remaining anonymous.

What I think you mean is this: Why is the mode selection for the following pairs of expressions different?

fricas

)set message selection on

sin(2)

 Function Selection for sin
      Arguments: PI 
   -> no appropriate sin found in PositiveInteger 
   -> no appropriate sin found in Integer 
   -> no appropriate sin found in PositiveInteger 
   -> no appropriate sin found in Integer 

 Modemaps from Associated Packages 
   no modemaps

 Remaining General Modemaps 
   [1] D -> D from D if D has TRIGCAT

 [1]  signature:   EXPR(INT) -> EXPR(INT)
      implemented: slot    from EXPR(INT)

$\label{eq5}\sin \left({2}\right)$

(5)

Type: Expression(Integer)

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digamma(2)

 Function Selection for digamma
      Arguments: PI 

 [1]  signature:   EXPR(INT) -> EXPR(INT)
      implemented: slot    from EXPR(INT)
 [2]  signature:   FLOAT -> FLOAT
      implemented: slot (Float)(Float) from FSFUN
 [3]  signature:   COMPLEX(DFLOAT) -> COMPLEX(DFLOAT)
      implemented: slot (Complex (DoubleFloat))(Complex (DoubleFloat)) from DFSFUN
 [4]  signature:   COMPLEX(FLOAT) -> COMPLEX(FLOAT)
      implemented: slot (Complex (Float))(Complex (Float)) from FSFUN

$\label{eq6}digamma \left({2}\right)$

(6)

Type: Expression(Integer)

and

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sin(2.0)

 Function Selection for float
      Arguments: (INT, INT, PI) 
      Target type: FLOAT 
      From:      FLOAT 

 [1]  signature:   (INT, INT, PI) -> FLOAT
      implemented: slot  (Integer)(Integer)(PositiveInteger) from FLOAT

 Function Selection for sin
      Arguments: FLOAT 

 [1]  signature:   FLOAT -> FLOAT
      implemented: slot    from FLOAT

$\label{eq7}0.9092974268 \ 256816954$

(7)

Type: Float

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digamma(2.0)

 Function Selection for float
      Arguments: (INT, INT, PI) 
      Target type: FLOAT 
      From:      FLOAT 

 [1]  signature:   (INT, INT, PI) -> FLOAT
      implemented: slot  (Integer)(Integer)(PositiveInteger) from FLOAT

 Function Selection for digamma
      Arguments: FLOAT 
   -> no appropriate digamma found in Float 
   -> no appropriate digamma found in Float 

 Modemaps from Associated Packages 
   [1] Complex(Float) -> Complex(Float) from FloatSpecialFunctions
   [2] Float -> Float from FloatSpecialFunctions
   [3] Complex(DoubleFloat) -> Complex(DoubleFloat)
            from DoubleFloatSpecialFunctions

 [1]  signature:   FLOAT -> FLOAT
      implemented: slot (Float)(Float) from FSFUN
 [2]  signature:   COMPLEX(DFLOAT) -> COMPLEX(DFLOAT)
      implemented: slot (Complex (DoubleFloat))(Complex (DoubleFloat)) from DFSFUN
 [3]  signature:   COMPLEX(FLOAT) -> COMPLEX(FLOAT)
      implemented: slot (Complex (Float))(Complex (Float)) from FSFUN

$\label{eq8}0.4227843350 \ 9846713939 \ 3487909919 \ 85$

(8)

Type: Float

Since sin is defined in DoubleFloat? and digamma is defined in DoubleFloatSpecialFunctions? one should expect similar treatment.

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)show DoubleFloat

 DoubleFloat is a domain constructor.
 Abbreviation for DoubleFloat is DFLOAT 
 This constructor is exposed in this frame.
 180 Names for 220 Operations in this Domain.
------------------------------- Operations --------------------------------

 ?*? : (Integer, %) -> %               ?*? : (PositiveInteger, %) -> %
 ?*? : (%, %) -> %                     ?+? : (%, %) -> %
 ?-? : (%, %) -> %                     -? : % -> %
 ?/? : (%, Integer) -> %               ?/? : (%, %) -> %
 ?<? : (%, %) -> Boolean               ?<=? : (%, %) -> Boolean
 ?=? : (%, %) -> Boolean               ?>? : (%, %) -> Boolean
 ?>=? : (%, %) -> Boolean              Beta : (%, %, %) -> %
 Beta : (%, %) -> %                    D : (%, NonNegativeInteger) -> %
 D : % -> %                            Gamma : (%, %) -> %
 Gamma : % -> %                        OMwrite : (%, Boolean) -> String
 OMwrite : % -> String                 1 : () -> %
 0 : () -> %                           ?^? : (%, Integer) -> %
 ?^? : (%, PositiveInteger) -> %       ?^? : (%, %) -> %
 abs : % -> %                          acos : % -> %
 acosh : % -> %                        acot : % -> %
 acoth : % -> %                        acsc : % -> %
 acsch : % -> %                        airyAi : % -> %
 airyAiPrime : % -> %                  airyBi : % -> %
 airyBiPrime : % -> %                  angerJ : (%, %) -> %
 annihilate? : (%, %) -> Boolean       antiCommutator : (%, %) -> %
 asec : % -> %                         asech : % -> %
 asin : % -> %                         asinh : % -> %
 associates? : (%, %) -> Boolean       associator : (%, %, %) -> %
 atan : (%, %) -> %                    atan : % -> %
 atanh : % -> %                        base : () -> PositiveInteger
 besselI : (%, %) -> %                 besselJ : (%, %) -> %
 besselK : (%, %) -> %                 besselY : (%, %) -> %
 bits : () -> PositiveInteger          ceiling : % -> %
 charlierC : (%, %, %) -> %            coerce : % -> OutputForm
 coerce : Fraction(Integer) -> %       coerce : Integer -> %
 coerce : % -> %                       commutator : (%, %) -> %
 conjugate : % -> %                    convert : % -> DoubleFloat
 convert : % -> Float                  convert : % -> InputForm
 convert : % -> Pattern(Float)         convert : % -> String
 cos : % -> %                          cosh : % -> %
 cot : % -> %                          coth : % -> %
 csc : % -> %                          csch : % -> %
 differentiate : % -> %                digamma : % -> %
 digits : () -> PositiveInteger        diracDelta : % -> %
 ellipticE : (%, %) -> %               ellipticE : % -> %
 ellipticF : (%, %) -> %               ellipticK : % -> %
 ellipticPi : (%, %, %) -> %           exp : % -> %
 exp1 : () -> %                        exponent : % -> Integer
 factor : % -> Factored(%)             float : (Integer, Integer) -> %
 floor : % -> %                        fractionPart : % -> %
 gcd : List(%) -> %                    gcd : (%, %) -> %
 hankelH1 : (%, %) -> %                hankelH2 : (%, %) -> %
 hash : % -> SingleInteger             hermiteH : (%, %) -> %
 inv : % -> %                          jacobiCn : (%, %) -> %
 jacobiDn : (%, %) -> %                jacobiP : (%, %, %, %) -> %
 jacobiSn : (%, %) -> %                jacobiTheta : (%, %) -> %
 jacobiZeta : (%, %) -> %              kelvinBei : (%, %) -> %
 kelvinBer : (%, %) -> %               kelvinKei : (%, %) -> %
 kelvinKer : (%, %) -> %               kummerM : (%, %, %) -> %
 kummerU : (%, %, %) -> %              laguerreL : (%, %, %) -> %
 lambertW : % -> %                     latex : % -> String
 lcm : List(%) -> %                    lcm : (%, %) -> %
 legendreP : (%, %, %) -> %            legendreQ : (%, %, %) -> %
 lerchPhi : (%, %, %) -> %             log : % -> %
 log10 : % -> %                        log2 : % -> %
 lommelS1 : (%, %, %) -> %             lommelS2 : (%, %, %) -> %
 mantissa : % -> Integer               max : (%, %) -> %
 max : () -> %                         meixnerM : (%, %, %, %) -> %
 min : (%, %) -> %                     min : () -> %
 negative? : % -> Boolean              norm : % -> %
 nthRoot : (%, Integer) -> %           one? : % -> Boolean
 opposite? : (%, %) -> Boolean         order : % -> Integer
 pi : () -> %                          polygamma : (%, %) -> %
 polylog : (%, %) -> %                 positive? : % -> Boolean
 precision : () -> PositiveInteger     prime? : % -> Boolean
 qlog : % -> %                         qsqrt : % -> %
 ?quo? : (%, %) -> %                   recip : % -> Union(%,"failed")
 ?rem? : (%, %) -> %                   retract : % -> Fraction(Integer)
 retract : % -> Integer                riemannZeta : % -> %
 round : % -> %                        sample : () -> %
 sec : % -> %                          sech : % -> %
 sign : % -> Integer                   sign : % -> %
 sin : % -> %                          sinh : % -> %
 sizeLess? : (%, %) -> Boolean         smaller? : (%, %) -> Boolean
 sqrt : % -> %                         squareFree : % -> Factored(%)
 squareFreePart : % -> %               struveH : (%, %) -> %
 struveL : (%, %) -> %                 tan : % -> %
 tanh : % -> %                         toString : % -> String
 truncate : % -> %                     unit? : % -> Boolean
 unitCanonical : % -> %                unitStep : % -> %
 weberE : (%, %) -> %                  weierstrassP : (%, %, %) -> %
 whittakerM : (%, %, %) -> %           whittakerW : (%, %, %) -> %
 wholePart : % -> Integer              zero? : % -> Boolean
 ?~=? : (%, %) -> Boolean             
 ?*? : (Fraction(Integer), %) -> %
 ?*? : (NonNegativeInteger, %) -> %
 ?*? : (%, Fraction(Integer)) -> %
 OMwrite : (OpenMathDevice, %, Boolean) -> Void
 OMwrite : (OpenMathDevice, %) -> Void
 ?^? : (%, Fraction(Integer)) -> %
 ?^? : (%, NonNegativeInteger) -> %
 characteristic : () -> NonNegativeInteger
 differentiate : (%, NonNegativeInteger) -> %
 divide : (%, %) -> Record(quotient: %,remainder: %)
 doubleFloatFormat : String -> String
 euclideanSize : % -> NonNegativeInteger
 expressIdealMember : (List(%), %) -> Union(List(%),"failed")
 exquo : (%, %) -> Union(%,"failed")
 extendedEuclidean : (%, %) -> Record(coef1: %,coef2: %,generator: %)
 extendedEuclidean : (%, %, %) -> Union(Record(coef1: %,coef2: %),"failed")
 float : (Integer, Integer, PositiveInteger) -> %
 gcdPolynomial : (SparseUnivariatePolynomial(%), SparseUnivariatePolynomial(%)) -> SparseUnivariatePolynomial(%)
 hashUpdate! : (HashState, %) -> HashState
 hypergeometricF : (List(%), List(%), %) -> %
 lcmCoef : (%, %) -> Record(llcm_res: %,coeff1: %,coeff2: %)
 leftPower : (%, NonNegativeInteger) -> %
 leftPower : (%, PositiveInteger) -> %
 leftRecip : % -> Union(%,"failed")
 meijerG : (List(%), List(%), List(%), List(%), %) -> %
 multiEuclidean : (List(%), %) -> Union(List(%),"failed")
 patternMatch : (%, Pattern(Float), PatternMatchResult(Float,%)) -> PatternMatchResult(Float,%)
 plenaryPower : (%, PositiveInteger) -> %
 principalIdeal : List(%) -> Record(coef: List(%),generator: %)
 rationalApproximation : (%, NonNegativeInteger, NonNegativeInteger) -> Fraction(Integer)
 rationalApproximation : (%, NonNegativeInteger) -> Fraction(Integer)
 retractIfCan : % -> Union(Fraction(Integer),"failed")
 retractIfCan : % -> Union(Integer,"failed")
 rightPower : (%, NonNegativeInteger) -> %
 rightPower : (%, PositiveInteger) -> %
 rightRecip : % -> Union(%,"failed")
 subtractIfCan : (%, %) -> Union(%,"failed")
 toString : (%, NonNegativeInteger) -> String
 unitNormal : % -> Record(unit: %,canonical: %,associate: %)
 weierstrassPInverse : (%, %, %) -> %
 weierstrassPPrime : (%, %, %) -> %
 weierstrassSigma : (%, %, %) -> %
 weierstrassZeta : (%, %, %) -> %

fricas

)show DoubleFloatSpecialFunctions

 DoubleFloatSpecialFunctions is a package constructor
 Abbreviation for DoubleFloatSpecialFunctions is DFSFUN 
 This constructor is exposed in this frame.
------------------------------- Operations --------------------------------

 besselI : (DoubleFloat, DoubleFloat) -> DoubleFloat
 besselI : (Complex(DoubleFloat), Complex(DoubleFloat)) -> Complex(DoubleFloat)
 besselJ : (DoubleFloat, DoubleFloat) -> DoubleFloat
 besselJ : (Complex(DoubleFloat), Complex(DoubleFloat)) -> Complex(DoubleFloat)
 besselK : (DoubleFloat, DoubleFloat) -> DoubleFloat
 besselK : (Complex(DoubleFloat), Complex(DoubleFloat)) -> Complex(DoubleFloat)
 besselY : (DoubleFloat, DoubleFloat) -> DoubleFloat
 besselY : (Complex(DoubleFloat), Complex(DoubleFloat)) -> Complex(DoubleFloat)
 digamma : Complex(DoubleFloat) -> Complex(DoubleFloat)
 polygamma : (NonNegativeInteger, Complex(DoubleFloat)) -> Complex(DoubleFloat)

please excuse my premature change of status --Bill Page, Wed, 23 Mar 2005 18:10:37 -0600 reply

Status: rejected => open

Treating special functions like Expression Integer --Bill Page, Wed, 23 Mar 2005 20:06:31 -0600 reply

Apparently the difference has something to do with the fact that DoubleFloat? is a domain while DoubleFloatSpecialFunctions? is a package. It is possible to obtain some of the effectst that you want by dropping the DoubleFloatSpecialFunctions? from the list of exposed constructors.

fricas

)set expose drop constructor DoubleFloatSpecialFunctions

   DoubleFloatSpecialFunctions is now explicitly hidden in frame 
      initial

Then these are treated the same

fricas

sin(2)

 Function Selection for sin
      Arguments: PI 
   -> no appropriate sin found in PositiveInteger 
   -> no appropriate sin found in Integer 
   -> no appropriate sin found in PositiveInteger 
   -> no appropriate sin found in Integer 

 Modemaps from Associated Packages 
   no modemaps

 Remaining General Modemaps 
   [1] D -> D from D if D has TRIGCAT

 [1]  signature:   EXPR(INT) -> EXPR(INT)
      implemented: slot    from EXPR(INT)

$\label{eq9}\sin \left({2}\right)$

(9)

Type: Expression(Integer)

fricas

digamma(2)

 Function Selection for digamma
      Arguments: PI 
   -> no appropriate digamma found in PositiveInteger 
   -> no appropriate digamma found in Integer 
   -> no appropriate digamma found in PositiveInteger 
   -> no appropriate digamma found in Integer 

 Modemaps from Associated Packages 
   no modemaps

 Remaining General Modemaps 
   [1] D -> D from D if D has SPFCAT
   [2] Complex(Float) -> Complex(Float) from FloatSpecialFunctions
   [3] Float -> Float from FloatSpecialFunctions

 [1]  signature:   EXPR(INT) -> EXPR(INT)
      implemented: slot    from EXPR(INT)
 [2]  signature:   FLOAT -> FLOAT
      implemented: slot (Float)(Float) from FSFUN
 [3]  signature:   COMPLEX(FLOAT) -> COMPLEX(FLOAT)
      implemented: slot (Complex (Float))(Complex (Float)) from FSFUN

$\label{eq10}digamma \left({2}\right)$

(10)

Type: Expression(Integer)

except now it is necessary to do a package call to evaluate it even for something that is a floating point value.

fricas

digamma(2.0)

 Function Selection for float
      Arguments: (INT, INT, PI) 
      Target type: FLOAT 
      From:      FLOAT 

 [1]  signature:   (INT, INT, PI) -> FLOAT
      implemented: slot  (Integer)(Integer)(PositiveInteger) from FLOAT

 Function Selection for digamma
      Arguments: FLOAT 
   -> no appropriate digamma found in Float 
   -> no appropriate digamma found in Float 

 Modemaps from Associated Packages 
   [1] Complex(Float) -> Complex(Float) from FloatSpecialFunctions
   [2] Float -> Float from FloatSpecialFunctions

 [1]  signature:   FLOAT -> FLOAT
      implemented: slot (Float)(Float) from FSFUN
 [2]  signature:   COMPLEX(FLOAT) -> COMPLEX(FLOAT)
      implemented: slot (Complex (Float))(Complex (Float)) from FSFUN

$\label{eq11}0.4227843350 \ 9846713939 \ 3487909919 \ 85$

(11)

Type: Float

fricas

digamma(2.0)$DoubleFloatSpecialFunctions

 Function Selection for float
      Arguments: (INT, INT, PI) 
      Target type: FLOAT 
      From:      FLOAT 

 [1]  signature:   (INT, INT, PI) -> FLOAT
      implemented: slot  (Integer)(Integer)(PositiveInteger) from FLOAT

 Function Selection for digamma
      Arguments: FLOAT 
      Target type: COMPLEX(DFLOAT) 
      From:      DFSFUN 

 [1]  signature:   COMPLEX(DFLOAT) -> COMPLEX(DFLOAT)
      implemented: slot (Complex (DoubleFloat))(Complex (DoubleFloat)) from DFSFUN

$\label{eq12}0.42278433509846725$

(12)

Type: Complex(DoubleFloat?)

Icomplete gamma function is missing --unknown, Thu, 24 Mar 2005 11:16:59 -0600 reply

In DoubleFloatSpecialFunctions?, incomplete gamma function is missing. If someone implements it, it's possible to add SpecialFunctionCategory? to the "Exports" of DoubleFloat? (add all these functions... => I don't know why gamma is actually exported by DoubleFloat?), unexpose DoubleFloatSpecialFunctions? and may be SpecialFunction?(Integer) will work as requested. The actual behavior is really annoying
Cheers

= --unknown, Fri, 18 Aug 2006 19:10:00 -0500 reply

Category: Axiom Library => building Axiom from source Severity: serious => normal Status: open => planned

= --unknown, Fri, 18 Aug 2006 19:10:38 -0500 reply

revert status --greg, Fri, 18 Aug 2006 19:32:48 -0500 reply

Category: building Axiom from source => Axiom Library Severity: normal => serious Status: planned => open

... --test1, Tue, 15 Apr 2014 16:59:31 +0000 reply

Status: open => closed

Subject: Be Bold !!

	( 15 subscribers )