[Axiom-developer] [Axiom-mail] [Axiom-mail] [Axiom-mail] A newby question about eval andExpression

[Doug Stewart]

Changes http://page.axiom-developer.org/zope/mathaction/AxiomMail/diff
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William Sit wrote:

>Changes http://page.axiom-developer.org/zope/mathaction/AxiomMail/diff
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>Doug Stewart wrote:
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>>But it is a constant ---- How can I tell axiom that it is a constant?
>>I tried this way but :-(
>>)clear all
>>digits 20
>>-- n:=x^3+a1*x^2+a2*x+a3 ::Polynomial Fraction Integer
>>
>>a1:=1
>>a2:=1
>>a3:=1
>>
>>Q:=(3*'a2-'a1^2)/9
>>R:=(9*'a1*'a2-27*'a3-2*'a1^3)/54
>>S:  Complex Float :=(R+(Q^3+R^2)^(1/2))^(1/3)
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>>I thought that if I gave a1 a2 a3 some in integer values, that Maxima
>>would then know that it was a constant but no it thinks it is a variable????
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>Perhaps you try removing the single quotes?
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If I do that then it puts the ones in and that is not what I want.
I want a symbolic answer not a numeric one.
Doug Stewart

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