I tried to do some calculations and used a self-defined function.
After that, I wanted to change it to another function like sin or
just
a constant.
I am using the binary version on Ubuntu Karmic.
What I got was the following:
----------------------------------------------------------------------
| Sage Version 4.3.3, Release Date: 2010-02-21 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: var('t1,t2,t3')
(t1, t2, t3)
sage:
f1=function('f1',x)
sage:
et1=t1==f1(x=t2)*t3
sage:
et1.substitute_function(f1,sin)
t1 == t3*f1(t2)
Didn't I get how it works?
Thanks,
Tobi
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