Issue 3545 in sympy: solving a complicated expression with square roots

2012-12-02 Thread sympy
Status: Valid Owner: Labels: Type-Defect Priority-Medium Solvers New issue 3545 by asmeu...@gmail.com: solving a complicated expression with square roots http://code.google.com/p/sympy/issues/detail?id=3545 From http://colabti.org/irclogger/irclogger_log/sympy?date=2012-12-02 09:05 R0b0

Re: Issue 3545 in sympy: solving a complicated expression with square roots

2012-12-02 Thread sympy
Comment #1 on issue 3545 by asmeu...@gmail.com: solving a complicated expression with square roots http://code.google.com/p/sympy/issues/detail?id=3545 So the issue here is 1. Can we get solve() to return something simpler? 2. solve() just hangs unless you call it with simplify=False and

Re: Issue 3545 in sympy: solving a complicated expression with square roots

2012-12-02 Thread sympy
Comment #2 on issue 3545 by asmeu...@gmail.com: solving a complicated expression with square roots http://code.google.com/p/sympy/issues/detail?id=3545 I missed the last part of the pastebin: The reflection of f over g is then given in parameterized form as x(m) = q y(m) = p(

Issue 3546 in sympy: 0*x

2012-12-02 Thread sympy
Status: Valid Owner: Labels: Type-Defect Priority-Medium New issue 3546 by smi...@gmail.com: 0*x http://code.google.com/p/sympy/issues/detail?id=3546 0*x 0 0*oo nan The x and all factors for which is_finite is not True should be retained in a product so that a proper determination of

Re: Issue 3546 in sympy: 0*x

2012-12-02 Thread sympy
Comment #1 on issue 3546 by asmeu...@gmail.com: 0*x http://code.google.com/p/sympy/issues/detail?id=3546 I think this was discussed before. If 0*x remained unevaluated, then nothing would work like you want it to. x - x would not go to 0. Try making the change in the core and seeing how ma

Issue 3547 in sympy: Undefined functions with number arguments should have is_number be False

2012-12-02 Thread sympy
Status: Valid Owner: Labels: Type-Defect Priority-Medium New issue 3547 by smi...@gmail.com: Undefined functions with number arguments should have is_number be False http://code.google.com/p/sympy/issues/detail?id=3547 Function('f')(1).is_number True Perhaps it would be better to have