Updates:
Status: Fixed
Comment #4 on issue 3171 by skirpic...@gmail.com: direction doesn't affect
some limits
http://code.google.com/p/sympy/issues/detail?id=3171
Fixed in this commit:
commit 68c851d171ad3e89ac16b00ac272f36e7f61b3b8
Author: Sai Nikhil <tsnleg...@gmail.com>
Date: Thu Apr 5 17:22:54 2012 +0530
To compute limits of e.is_Pow and resolve issue id #2455
For the limits of the form, limit(1/(x-a)^b, x, a, dir="+/-") and
limit(1/(a
-x)^b, x, a, dir="+/-") and also limit(1/sin(x^a)^b, x, x0, dir="+/-") ,
limit(1
/cos(x^a)^b, x, x0, dir="+/-") , limit(1/tan(x^a)^b, x, x0, dir="+/-") and
limit
(1/cot(x^a)^b, x, x0, dir="+/-") shows wrong results when (x0)**a is an
integral
multiple of pi or pi/2, depending upon where the denominator goes to zero,
the
answer obtained by finding through current code is wrong.
This patch gives the accurate results.
Necessary test cases are also attached.
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