Comment #2 on issue 2397 by asmeurer: log.as_numer_denom is doing the log
expansion
http://code.google.com/p/sympy/issues/detail?id=2397
Yes, we've needed a force keyword on expand_log for some time.
Do you mean just automatically expanding the numerator and denominator? I
remember having some discussion a while back about what log should do
automatically with numbers. I guess we should dig that up and see what was
said. Clearly it shouldn't automatically expand factors of numbers (like
log(6) => log(2) + log(3)), or else you will get explosions with things
like log(factorial(10)).
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