Comment #6 on issue 2219 by asmeurer: Arbitrary constants in indefinite integration
http://code.google.com/p/sympy/issues/detail?id=2219
Like I said in comment 2, you can get all the free symbols in an expression by doing expr.free_symbols. That should be sufficient to implement 3.
In [38]: (x + y + z).free_symbols Out[38]: set(x, y, z) Also consider what happens with multiple integrals (like Integral(1, x, y)). -- You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com. To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en.