Updates:
Cc: [email protected] [email protected]
Comment #14 on issue 2848 by [email protected]: Failing test in
sympy/solvers/test/test_solvers.py
http://code.google.com/p/sympy/issues/detail?id=2848
I think issue 2851 is a different issue (see my comments there).
If solve calls logcombine(force=True), then it should do it. And then the
checking facility should be able to determine that it's correct. I defer
to Chris here, though (or Nicolas), as he knows more about the architecture
of solve. I think in the general case, we may need to try both
logcombining and not logcombining, in case logcombine(force=True) really
does make it no longer valid.
Perhaps simplify's expression size checking should be combined with
checksol somehow to return the smallest solution that still satisfies the
equation. I think the custom measure function functionality I recently
implemented in simplify() could be used to do this (set the measure to oo
if the solution doesn't satisfy the equation).
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