Re: Issue 1026 in sympy: pypy doesn't run sympy

Comment #14 on issue 1026 by vlada.pe...@gmail.com: pypy doesn't run sympy http://code.google.com/p/sympy/issues/detail?id=1026 I've applied Ronan's patch enabling pytest on top of your patch (and pushed to [1]) and run py.test on the files you had errors in (as a rule they're more informati

Re: Issue 1816 in sympy: Adding partial derivatives and taking derivatives with respect to functions

Comment #19 on issue 1816 by Vinzent.Steinberg: Adding partial derivatives and taking derivatives with respect to functions http://code.google.com/p/sympy/issues/detail?id=1816 In variational calculus, the first derivative of a functional is not that complicated. Acutally, it's definition i

Issue 2552 in sympy: (1/(x*y)).subs(x*y, whatever) doesn't work

Status: New Owner: Labels: Type-Defect Priority-High New issue 2552 by matt...@gmail.com: (1/(x*y)).subs(x*y, whatever) doesn't work http://code.google.com/p/sympy/issues/detail?id=2552 In [1]: (1/(x*y)).subs(x*y, 2) Out[1]: 1 ─── x⋅y -- You received this message because you are subscr

Re: Issue 2552 in sympy: (1/(x*y)).subs(x*y, whatever) doesn't work

Updates: Status: Accepted Comment #1 on issue 2552 by asmeurer: (1/(x*y)).subs(x*y, whatever) doesn't work http://code.google.com/p/sympy/issues/detail?id=2552 This is why: In [15]: a = 1/(x*y) In [16]: a.args Out[16]: ⎛1 1⎞ ⎜─, ─⎟ ⎝x y⎠ -- You received this message because you

Re: Issue 2552 in sympy: (1/(x*y)).subs(x*y, whatever) doesn't work

Comment #2 on issue 2552 by asmeurer: (1/(x*y)).subs(x*y, whatever) doesn't work http://code.google.com/p/sympy/issues/detail?id=2552 This also doesn't work: In [21]: x, y = symbols('x y', positive=True) In [22]: sqrt(x*y) Out[22]: ⎽⎽⎽ ⎽⎽⎽ ╲╱ x ⋅╲╱ y In [23]: sqrt(x*y).subs(x*y, 2) Out

Re: Issue 2552 in sympy: (1/(x*y)).subs(x*y, whatever) doesn't work

Updates: Cc: smi...@gmail.com Comment #3 on issue 2552 by asmeurer: (1/(x*y)).subs(x*y, whatever) doesn't work http://code.google.com/p/sympy/issues/detail?id=2552 This is nontrivial to fix, btw, because Pow(a, e)*Pow(b, e) != Pow(a*b, e) in general (that's why I had to set x and y

Re: Issue 2549 in sympy: as_independent gives incorrect output for some functions of non commutative symbols

Updates: Status: Fixed Comment #2 on issue 2549 by smi...@gmail.com: as_independent gives incorrect output for some functions of non commutative symbols http://code.google.com/p/sympy/issues/detail?id=2549 (No comment was entered for this change.) -- You received this message because

Re: Issue 2552 in sympy: (1/(x*y)).subs(x*y, whatever) doesn't work

Comment #4 on issue 2552 by smi...@gmail.com: (1/(x*y)).subs(x*y, whatever) doesn't work http://code.google.com/p/sympy/issues/detail?id=2552 A step forward on this might be to change as_base_exp so that a Mul of bases to the same Integer exponent (which automatically gets separated at in

Re: Issue 2552 in sympy: (1/(x*y)).subs(x*y, whatever) doesn't work

Comment #5 on issue 2552 by smi...@gmail.com: (1/(x*y)).subs(x*y, whatever) doesn't work http://code.google.com/p/sympy/issues/detail?id=2552 (And the OP example failed before the modifications I made, too, so it's not something that was untested but working previously.) -- You received t

Re: Issue 2552 in sympy: (1/(x*y)).subs(x*y, whatever) doesn't work

Comment #6 on issue 2552 by asmeurer: (1/(x*y)).subs(x*y, whatever) doesn't work http://code.google.com/p/sympy/issues/detail?id=2552 ...but that is a case where I really don't like the automatic algebraic logic of the current subs anyway as I've noted in other issues. Well, that's why it

Re: Issue 2081 in sympy: Pow substitution introduces wrong answers

Updates: Blockedon: 2026 Comment #19 on issue 2081 by asmeurer: Pow substitution introduces wrong answers http://code.google.com/p/sympy/issues/detail?id=2081 (No comment was entered for this change.) -- You received this message because you are subscribed to the Google Groups "symp

Re: Issue 2026 in sympy: Exact, algebraic, and integer_power substitution

Issue 2026: Exact, algebraic, and integer_power substitution http://code.google.com/p/sympy/issues/detail?id=2026 This issue is now blocking issue 2081. See http://code.google.com/p/sympy/issues/detail?id=2081 -- You received this message because you are listed in the owner or CC fields of this