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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