Issue 996 in sympy: bad integration of 1/(1 + x**2)

Updates: Status: Fixed Comment #3 on issue 996 by mattpap: bad integration of 1/(1 + x**2) http://code.google.com/p/sympy/issues/detail?id=996 This issue was fixed together with #636: In [1]: integrate(1/(x**2+1), x) Out[1]: atan(x) In [2]: integrate(1/(1+x**2), (x, -oo, oo)) Out[2]: π

Issue 687 in sympy: integrate(1/(1+x**5), x) could be made simpler by using atan

Updates: Status: Fixed Comment #14 on issue 687 by mattpap: integrate(1/(1+x**5), x) could be made simpler by using atan http://code.google.com/p/sympy/issues/detail?id=687 This issue was fixed together with #636. -- You received this message because you are listed in the owner or CC

Issue 339 in sympy: Series and expand as functions

Updates: Owner: --- Comment #13 on issue 339 by fab...@fseoane.net: Series and expand as functions http://code.google.com/p/sympy/issues/detail?id=339 I'm concentrating on the new assumption system, so I leave this unassigned in case someone in interesed -- You received this message

Issue 1182 in sympy: global variable 'cubic' undefined in sympy/polys/rootfinding.py

Updates: Status: Fixed Comment #7 on issue 1182 by mattpap: global variable 'cubic' undefined in sympy/polys/rootfinding.py http://code.google.com/p/sympy/issues/detail?id=1182 This issue was fixed long ago. Moreover, support for Real arguments was added in: http://git.sympy.or

Issue 636 in sympy: integrate(1/(x**2+1)) should return arctan(x)

Updates: Status: Fixed Owner: --- Comment #15 on issue 636 by mattpap: integrate(1/(x**2+1)) should return arctan(x) http://code.google.com/p/sympy/issues/detail?id=636 This issue was fixed by merging 'ratint' branch: http://git.sympy.org/?p=sympy.git;a=commit;h=c5e6ef1eb

Issue 1313 in sympy: poly_gcd should not be exported as a top-level function

Updates: Status: Fixed Labels: -NeedsReview Comment #4 on issue 1313 by mattpap: poly_gcd should not be exported as a top-level function http://code.google.com/p/sympy/issues/detail?id=1313 Thanks for review. This is now: http://git.sympy.org/?p=sympy.git;a=commit;h=ca55e

Issue 953 in sympy: integrate(cos(asin(x))) cannot do it

Updates: Status: Fixed Comment #3 on issue 953 by mattpap: integrate(cos(asin(x))) cannot do it http://code.google.com/p/sympy/issues/detail?id=953 A test for this issue was pushed as: http://git.sympy.org/?p=sympy.git;a=commit;h=dbcc212fdc1a26bce79126b8ab1c370ec8bbf14a -- You rec

Issue 1308 in sympy: simplify gives error on expressions containing exp()

Comment #5 on issue 1308 by ondrej.certik: simplify gives error on expressions containing exp() http://code.google.com/p/sympy/issues/detail?id=1308 Great job! So that's it -- the _eval_power() is being called with 1/2 as the "b" argument, but there should be an exponential in that argument.

Issue 1315 in sympy: Lane-Emden equation returns wrong solution for n=1, and in general is not supported

Status: New Owner: Labels: Type-Defect Priority-Medium New issue 1315 by johann.cohentanugi: Lane-Emden equation returns wrong solution for n=1, and in general is not supported http://code.google.com/p/sympy/issues/detail?id=1315 for n=1 : In [14]: dsolve(f(x).diff(x, x)+2/x*f(x).diff(x)+f

Issue 687 in sympy: integrate(1/(1+x**5), x) could be made simpler by using atan

Updates: Status: Verified Comment #15 on issue 687 by ondrej.certik: integrate(1/(1+x**5), x) could be made simpler by using atan http://code.google.com/p/sympy/issues/detail?id=687 In [1]: integrate(1/(1+x**5), x) Out[1]: ⎛ ⎽⎽⎽⎞⎛ ⎛⎽⎽⎽⎞ ⎞ ⎛

Issue 1316 in sympy: -Qnew tests fail

Status: Accepted Owner: CC: mattpap Labels: Type-Defect Priority-Medium Priority-Critical Milestone-Release0.6.4 New issue 1316 by ondrej.certik: -Qnew tests fail http://code.google.com/p/sympy/issues/detail?id=1316 The new patch series don't run all tests: http://buildbot.sympy.org/waterf

Issue 1315 in sympy: Lane-Emden equation returns wrong solution for n=1, and in general is not supported

Updates: Status: Accepted Comment #1 on issue 1315 by ondrej.certik: Lane-Emden equation returns wrong solution for n=1, and in general is not supported http://code.google.com/p/sympy/issues/detail?id=1315 Thanks for the bug report. dsolve() failed to determine the type of equation a

Issue 1317 in sympy: Wild/match does not discard x correctly

Status: New Owner: Labels: Type-Defect Priority-Medium New issue 1317 by johann.cohentanugi: Wild/match does not discard x correctly http://code.google.com/p/sympy/issues/detail?id=1317 r = eq.match(a*f(x).diff(x,x) + b*diff(f(x),x) + c*f(x)) a = Wild('a', exclude=[x]) b = Wild('b', exclud

Issue 1316 in sympy: -Qnew tests fail

Updates: Owner: mattpap Comment #1 on issue 1316 by mattpap: -Qnew tests fail http://code.google.com/p/sympy/issues/detail?id=1316 I didn't notice this (it was off the screen :). I will look into it in a minute. -- You received this message because you are listed in the owner or CC fi

Issue 1316 in sympy: -Qnew tests fail

Updates: Status: Fixed Owner: --- Cc: -mattpap Labels: -Priority-Critical -Milestone-Release0.6.4 Comment #2 on issue 1316 by mattpap: -Qnew tests fail http://code.google.com/p/sympy/issues/detail?id=1316 I went ahead and committed a trivial fix to this issue: ht

Issue 1316 in sympy: -Qnew tests fail

Updates: Status: Verified Comment #3 on issue 1316 by ondrej.certik: -Qnew tests fail http://code.google.com/p/sympy/issues/detail?id=1316 Thanks, now everything passes. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred t

Issue 1318 in sympy: Interval arithmetic support

Status: New Owner: Labels: Type-Defect Priority-Medium New issue 1318 by jorn.baayen: Interval arithmetic support http://code.google.com/p/sympy/issues/detail?id=1318 It would be great if sympy would support mpmath's interval arithmetic class, mpi, so that one could do something like: f=x*

Issue 1308 in sympy: simplify gives error on expressions containing exp()

Comment #6 on issue 1308 by plaes800: simplify gives error on expressions containing exp() http://code.google.com/p/sympy/issues/detail?id=1308 OK, finally cracked it, thanks for all the support. I have put patch here, please comment. http://plaes.org/files/2009-Q1/sympy-exp-simplification.

Issue 1318 in sympy: Interval arithmetic support

Updates: Status: Accepted Comment #1 on issue 1318 by ondrej.certik: Interval arithmetic support http://code.google.com/p/sympy/issues/detail?id=1318 Yes, I agree. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this is

Issue 1308 in sympy: simplify gives error on expressions containing exp()

Updates: Status: Started Owner: ondrej.certik Comment #7 on issue 1308 by ondrej.certik: simplify gives error on expressions containing exp() http://code.google.com/p/sympy/issues/detail?id=1308 Great job! The patch is +1. I'll merge it soon. I added you to the google code pro

Issue 1308 in sympy: simplify gives error on expressions containing exp()

Comment #8 on issue 1308 by plaes800: simplify gives error on expressions containing exp() http://code.google.com/p/sympy/issues/detail?id=1308 Version 2 of the patch. The Mul part of this previously fixed if-else chain looked also fishy so I managed to write a test that broke it ;) With th

Issue 1309 in sympy: implement backward chaining for rules

Comment #6 on issue 1309 by ondrej.certik: implement backward chaining for rules http://code.google.com/p/sympy/issues/detail?id=1309 Thanks, I'll try to have a look at it in the plane. -- You received this message because you are listed in the owner or CC fields of this issue, or because you