Status: New
Owner: nicolas.pourcelot
Labels: Type-Defect Priority-Medium WrongResult
New issue 2084 by nicolas.pourcelot: limit(1+1/x, x, 0, dir='-') fails
http://code.google.com/p/sympy/issues/detail?id=2084
sympy.limit(1/x,x,0,dir="-")
-oo
But :
limit(1+1/x,x,0,dir="-")
oo
That's because gruntz() is applied for 1/x, but some heuristics are first
applied to all Add instances.
Heuristics apply simple substitution, unless NaN is returned ; but 1/0
returns oo, and not NaN.
1/0
oo
-1/0
-oo
I may patch limit to have more restrictive heuristics, but imo this isn't
the right solution, since 1/0 should return NaN (or maybe Zoo ?) anyway.
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