Updates:
Status: Fixed
Labels: Solvers
Comment #1 on issue 2190 by asmeurer: dsolve first order linear
differential equation failed.
http://code.google.com/p/sympy/issues/detail?id=2190
The result in the current master is correct:
In [6]: print dsolve(y(t).diff(t)+y(t)-u(t), y(t))
y(t) == exp(-t)*(C1 + Integral(exp(t)*u(t), t))
Bisecting shows it was fixed by this commit:
commit aeb80f87a16fad38ffc44b18aa52d739519e003b
Author: Chris Smith <[email protected]>
Date: Mon Sep 6 10:07:26 2010 +0545
2049: don't set evaluate to True when doing subs
If you want doit done then you have to do so after the subs
or write a custom routine to do so for you.
But thanks for submitting the bug anyway! Let us know if you find any
other problems.
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