Updates:
Summary: Implement more general piecewise integration algorithm
Comment #16 on issue 2128 by asmeurer: Implement more general piecewise
integration algorithm
http://code.google.com/p/sympy/issues/detail?id=2128
I think the algorithm used is as given in this paper:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.70.4127&rep=rep1&type=pdf
The basic idea is to convert the piecewise function into a combination of
Heaviside functions, then to use some integration rules to integrate that,
and then to convert it back. So if you would like to help implement any of
that, feel free as well (actually, feel free to help with anything :-). I
will change the issue to implement that.
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