Updates:
Status: NeedsDecision
Comment #3 on issue 3638 by [email protected]: Automatic series expansion
while applying a function?
http://code.google.com/p/sympy/issues/detail?id=3638
Sympy already has some kind of it (present eval() methods for
functions). The question is up to which degree we should keep
unevaluated expressions.
I know that SymPy evaluates at numbers. That's a little different. Do any
functions currently automatically evaluate at series?
Hmm, why in this case?
Maybe I'm mistaken, but doesn't it require computing a power series in the
general case? For example, what about log(sin(x) + O(x**2)) (which doesn't
seem to work actually). To be correct, you would first have to compute the
power series of sin(x), remove terms lower than x**2, then evaluate it at
log.
What's so bad about calling series() again if you want a power series.
Actually, it's probably more efficient to hold off on calling series until
the end if you are going to apply several functions, so doesn't this often
represent a poor workflow anyway?
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