Comment #2 on issue 2981 by pr...@goodok.ru: document the "check" option of
solve()
http://code.google.com/p/sympy/issues/detail?id=2981
The cite from Aaron's letter:
"""
I was going to say that you could use cancel() to get rid of these,
but that only holds for rational functions. For example, sin(x)/x - 1
has a "zero" at x = 0, but the only way to get this from solve is to
give check=False. So I think we should keep it like this, but document
that if you want the others, you should pass check=False to solve().
In [31]: solve(sin(x)/x, x)
Out[31]: []
In [32]: solve(sin(x)/x, x, check=False)
Out[32]: [0]
"""
I don't understand how the 'sin(x)/x - 1' and 'solve(sin(x)/x, x)' are
related.
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