Comment #1 on issue 2540 by prashant...@gmail.com: log() not working
properly
http://code.google.com/p/sympy/issues/detail?id=2540
The above examples work if force=True argument is passed to the expand()
function.
log(x*y)
log(x*y)
log(x*y).expand(force=True)
log(x) + log(y)
But
Comment #2 on issue 2540 by prashant...@gmail.com: log() not working
properly
http://code.google.com/p/sympy/issues/detail?id=2540
In file sympy/functions/elementary/tests/test_exponential.py
from line 143, the following assertions are made and AFAIK and seen, these
assertions are meant
Comment #3 on issue 2540 by renato.c...@gmail.com: log() not working
properly
http://code.google.com/p/sympy/issues/detail?id=2540
The problem is that the separation is only valid if the symbols are
positive. So this works:
x, y = symbols('x y', positive=True)
log(x*y).expand()
log(x)
Updates:
Status: Invalid
Comment #4 on issue 2540 by asmeurer: log() not working properly
http://code.google.com/p/sympy/issues/detail?id=2540
Exactly. If you look right above that line in the test file, you can see
that p and q are defined as
p, q = symbols('p,q', positive=True)
r
