Excellent. Thank you Alex!
/hpon
On 13 Mar, 09:16, Alex Ghitza <aghi...@gmail.com> wrote:
> Hi,
>
> On Fri, Mar 13, 2009 at 7:09 PM, hpon <peter.norli...@gmail.com> wrote:
>
> > Hi,
>
> > What is the easiest way to make a mathematical substitution in Sage?
>
> > For example: We have
>
> > eqn1 = F == a + b
>
> I'm not sure I understand what you are trying to do in this line. If you
> just want to define F as the sum of a and b, use
>
> var('a b') # to tell Sage that a and b are symbolic
> variables
> F = a + b
>
>
>
> > and would like to use a = 0 and b = 3 to calculate F.
>
> Now F is a symbolic expression, and you can perform substitutions easily as
> follows:
>
> F.substitute(a=0, b=3) # and Sage will answer: 3
>
> If you do F.substitute? you will get the documentation for the substitution
> method, with more examples of usage.
>
> Best,
> Alex
>
> --
> Alex Ghitza -- Lecturer in Mathematics -- The University of Melbourne --
> Australia --http://www.ms.unimelb.edu.au/~aghitza/
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