Updates:
Cc: ronan.l...@gmail.com
Comment #2 on issue 3880 by asmeu...@gmail.com: Test failure in hyperexpand
http://code.google.com/p/sympy/issues/detail?id=3880
The fact that there is a test there indicates that it used to work. From
0.7.2:
In [1]: hyperexpand(hyper([-S.Half, 1], [2,2], z))
Out[1]:
z
─
z ⎛ 2 ⎞ 2 ⎛ z⎞
─ ⎝- 4⋅z + 12⋅z - 6⎠⋅ℯ ⋅besseli⎜0, ─⎟
⎛4⋅z 8⎞ 2 ⎛ z⎞ ⎝ 2⎠ 2
⎜─── - ─⎟⋅ℯ ⋅besseli⎜1, ─⎟ + ──────────────────────────────────── + ───
⎝ 9 9⎠ ⎝ 2⎠ 9⋅z 3⋅z
I bisected it to
commit 1f36cdd417c2f1bf8f5394a5d3379a85d869489a
Author: Ronan Lamy <ronan.l...@normalesup.org>
Date: Mon Nov 19 01:59:57 2012 +0000
Remove complicated piece of code that doesn't seem useful.
Obviously that complicated piece of code was useful :)
The revert requires a merge conflict resolution, so it would be best if
someone who knows what has happened in that code can do it. And let's be
sure to run the slow tests on the pull request (and on any further pull
request that touches hyperexpand/meijerg code!).
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