I have a short pull request for review: https://github.com/sympy/sympy/pull/596
as_independent uses has to determine whether an expression has the
symbol of interest or not. A potential problem is that an
expression
may have a bound symbol x that is not part of the free symbols of
the
expression. Now only subexpressions that don't have the symbol in
the
free symbols will be returned as independent.
Could someone take a look, please?
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