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From: |
root |
Subject: |
[Axiom-developer] [Axiom-mail] [Axiom-mail] [Axiom-mail] [Axiom-mail] A newby question about eval and Expression |
Date: |
Sat, 12 Nov 2005 21:51:46 -0600 |
Changes http://page.axiom-developer.org/zope/mathaction/AxiomMail/diff
--
hmmm, perhaps eval is broken but
eval(a78,x11,3) works
perhaps variable lookup is broken but
xtpd:=3
eval(x78,x11,xtpd) works
perhaps eval with a third arg of EXPR(INT) is broken but
xtpd2:Expression(Integer):=3
eval(x78,x11,xtpd2) works
perhaps eval fails if the third arg cannot be coerced to POLY(FRAC(INT)) but
xtpd2:Expression(Integer):=3*sqrt(2)
eval(x78,x11,xtpd2) works
next i tried changing the final line:
)clear all
digits 20
-- n:=x^3+a1*x^2+a2*x+a3 ::Polynomial Fraction Integer
Q:=(3*a2-a1^2)/9
R:=(9*a1*a2-27*a3-2*a1^3)/54
S:=(R+(Q^3+R^2)^(1/2))^(1/3)
T:=(R-(Q^3+R^2)^(1/2))^(1/3)
x1:=S+T-a1/3
x2:=-(S+T)/2-a1/3 + %i*sqrt(3)*(S-T)/2
x3:=-(S+T)/2-a1/3 - %i*sqrt(3)*(S-T)/2
a5:=x^3+a1*x^2+a2*x+a3 ::Polynomial Fraction Integer;
a6:=('x-x11) ::Polynomial Fraction Integer;
a7:=monicDivide(a5,a6,x) ;
a77:=a7.quotient ::Polynomial Fraction Integer;
a78:=a7.remainder ::Polynomial Fraction Integer;
qu1 :=eval(a77,x11,x1)
m:=eval(a78,x11,x1)
and THAT works. at least here.
t
--
forwarded from http://page.axiom-developer.org/zope/mathaction/address@hidden
- [Axiom-developer] [Axiom-mail] A newby question about eval and Expression, Doug Stewart, 2005/11/12
- [Axiom-developer] [Axiom-mail] [Axiom-mail] A newby question about eval and Expression, root, 2005/11/12
- [Axiom-developer] [Axiom-mail] [Axiom-mail] [Axiom-mail] A newby question about eval and Expression, Doug Stewart, 2005/11/12
- [Axiom-developer] [Axiom-mail] [Axiom-mail] [Axiom-mail] [Axiom-mail] A newby question about eval and Expression,
root <=
- [Axiom-developer] [Axiom-mail] [Axiom-mail] [Axiom-mail] [Axiom-mail] [Axiom-mail] A newby question about eval and Expression, Doug Stewart, 2005/11/12
- [Axiom-developer] [Axiom-mail] [Axiom-mail] [Axiom-mail] [Axiom-mail] [Axiom-mail] [Axiom-mail] A newby question about eval and Expression, root, 2005/11/12
- [Axiom-developer] [Axiom-mail] A newby question about eval and Expression, Martin Rubey, 2005/11/13
- [Axiom-developer] [Axiom-mail] A newby question about eval and Expression, Doug Stewart, 2005/11/13
- [Axiom-developer] [Axiom-mail] A newby question about eval and Expression, Martin Rubey, 2005/11/14
- [Axiom-developer] [Axiom-mail] [Axiom-mail] [Axiom-mail] A newby question about eval and Expression, root, 2005/11/12