On Thu, Dec 4, 2008 at 2:33 PM, Francois Maltey wrote:
> Bill, you endure the questions I ask about axiom.
> I don't see any other system which is really right for doing mathematics
> by computer. Mathematica is too expensive and Maple concept too
> cheap. Other open source systems I know are too Maple like.
>
> I find quite important to get a right reponse to
> solve (a^2*x+1=x+a, x) with 3 cases a=1, a=-1 and else.
>
> Usual cas reponse x=(a-1)/(a^2-1)=1/(a+1) is irrelavant, but mupad
> (now scilab) could do it.
>
I do not understand your description of the problem. As far as I can
see for case
(1) -> subst(a^2*x+1=x+a,a=1)
(1) x + 1= x + 1
Type: Equation(Expression(Integer))
There is an infinite number of solutions, and for cas
(2) -> subst(a^2*x+1=x+a,a=-1)
(2) x + 1= x - 1
Type: Equation(Expression(Integer))
There is no solution. But I have no problem with
(3) -> test subst(a^2*x+1=x+a,x=1/(a+1))
(3) true
Type: Boolean
What result do you get from mupad?
Regards,
Bill Page.
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