Issue 1657 in sympy: integrate(1/x, x) should return log(abs(x))

Comment #1 on issue 1657 by fredrik.johansson: integrate(1/x, x) should return log(abs(x)) http://code.google.com/p/sympy/issues/detail?id=1657 I think this has been discussed before? log(x) is valid for complex numbers, log(abs(x)) isn't. -- You received this message because you are listed

Issue 1659 in sympy: evalf gets wrong answer on polynomial

Status: New Owner: Labels: Type-Defect Priority-Medium New issue 1659 by carlo.hamalainen: evalf gets wrong answer on polynomial http://code.google.com/p/sympy/issues/detail?id=1659 See attached file for the polynomial. Evalf does not give the correct answer: print blah.evalf(subs =

Issue 1659 in sympy: evalf gets wrong answer on polynomial

Comment #2 on issue 1659 by carlo.hamalainen: evalf gets wrong answer on polynomial http://code.google.com/p/sympy/issues/detail?id=1659 It happens in 0.6.4 and 0.6.5. When is 0.7.x being released? -- You received this message because you are listed in the owner or CC fields of this

Issue 1660 in sympy: [PATCH] derivatives of composed functions should not evaluate to a derivative in terms of a function

Status: New Owner: Labels: Type-Defect Priority-Medium New issue 1660 by renato.c...@gmail.com: [PATCH] derivatives of composed functions should not evaluate to a derivative in terms of a function http://code.google.com/p/sympy/issues/detail?id=1660 In [1]: g(f(x)).diff(x) Out[1]:

Issue 1658 in sympy: [PATCH] derivatives of complex functions re, im, abs and arg don't evaluate correctly

Updates: Status: Started Labels: NeedsReview Comment #1 on issue 1658 by asmeurer: [PATCH] derivatives of complex functions re, im, abs and arg don't evaluate correctly http://code.google.com/p/sympy/issues/detail?id=1658 It can be a while before an issue with a patch can get

Issue 1620 in sympy: Allow derivatives of unknown functions evaluated at a point

Updates: Cc: ondrej.certik Comment #3 on issue 1620 by ondrej.certik: Allow derivatives of unknown functions evaluated at a point http://code.google.com/p/sympy/issues/detail?id=1620 I'll give it a shot, it should not be hard. -- You received this message because you are listed in

Issue 1620 in sympy: Allow derivatives of unknown functions evaluated at a point

Comment #4 on issue 1620 by asmeurer: Allow derivatives of unknown functions evaluated at a point http://code.google.com/p/sympy/issues/detail?id=1620 Great. When this gets fixed, I'll send in a patch implementing initial/boundary conditions in dsolve(), as I would like to use this for the

Issue 1658 in sympy: [PATCH] derivatives of complex functions re, im, abs and arg don't evaluate correctly

Comment #3 on issue 1658 by asmeurer: [PATCH] derivatives of complex functions re, im, abs and arg don't evaluate correctly http://code.google.com/p/sympy/issues/detail?id=1658 You need to add yourself as a member of the Google Code project. There should be a link to do it on the main

Issue 1659 in sympy: evalf gets wrong answer on polynomial

Comment #3 on issue 1659 by kevingoodsell2005: evalf gets wrong answer on polynomial http://code.google.com/p/sympy/issues/detail?id=1659 Are you sure this is fixed? I still see it in the latest git. -- You received this message because you are listed in the owner or CC fields of this issue,

Issue 1659 in sympy: evalf gets wrong answer on polynomial

Comment #4 on issue 1659 by kevingoo...@gmail.com: evalf gets wrong answer on polynomial http://code.google.com/p/sympy/issues/detail?id=1659 After experimenting and debugging for a while, I simplified the problem to this: In [102]: foo = 20 - 19*p - 5008329267844*p**25 - 477638700*p**37