Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 1944 by daniel.james.farrell: limit() returns incorrect answer for limit(exp(-x/a), x, oo)
http://code.google.com/p/sympy/issues/detail?id=1944

To find limit(exp(-x/a), x, oo) the sign of a is required, therefore if this is not defined it should
be impossible to compute the limit.

Behaviour:

var('a')
limit(exp(-x/a), x oo)
-oo

Expected behaviour:
Print an error message saying the sign of a is required before the limit can be calculated.


Other:
isympy --version
0.6.7-git





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