Updates:
Status: Invalid
Comment #9 on issue 3646 by julien.r...@gmail.com: Weird solution of x**y =
0
http://code.google.com/p/sympy/issues/detail?id=3646
Thanks Aaron, that was the missing piece:
In [1]: x = Symbol('x')
In [2]: y = Symbol('y', positive=True)
In [3]: solve(x**y)
O
Comment #8 on issue 3646 by prasoon9...@gmail.com: Weird solution of x**y =
0
http://code.google.com/p/sympy/issues/detail?id=3646
Well, x is just a symbol so I don't think we can't check whether x >= 0.
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Comment #5 on issue 3615 by ondrej.c...@gmail.com: Test failure with numpy
1.7.0
http://code.google.com/p/sympy/issues/detail?id=3615
Hm, I should have tested this before releasing NumPy 1.7.0. I think the
problem is in changing some casting rules in numpy. I'll have a look.
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Updates:
Labels: Concrete
Comment #1 on issue 3657 by asmeu...@gmail.com: Summation over non-integers
http://code.google.com/p/sympy/issues/detail?id=3657
It's called concrete, like the module.
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Labels: Type-Defect Priority-Medium
New issue 3657 by mrock...@gmail.com: Summation over non-integers
http://code.google.com/p/sympy/issues/detail?id=3657
Summation should support summing over discrete sets other than the
integers. E.g. sum the function f from 0 to 1
Comment #7 on issue 3646 by asmeu...@gmail.com: Weird solution of x**y = 0
http://code.google.com/p/sympy/issues/detail?id=3646
0**x == 0 is only true if x >= 0.
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Comment #24 on issue 2070 by asmeu...@gmail.com: All elements of .args
should be Basic
http://code.google.com/p/sympy/issues/detail?id=2070
It's not performance. It's just really nice to know that you can take any
element of .args and apply the Basic interface to it. This makes recursive
Comment #23 on issue 2070 by mrock...@gmail.com: All elements of .args
should be Basic
http://code.google.com/p/sympy/issues/detail?id=2070
Is it silly to drop this requirement and introduce isinstance(arg, Basic)
checks everywhere? I like having leaves be ints and strings on occasion.
I
Status: Valid
Owner:
Labels: Type-Defect Priority-Medium Matrices EasyToFix
New issue 3656 by mrock...@gmail.com: Fancy indexing in Matrix
http://code.google.com/p/sympy/issues/detail?id=3656
I want to be able to index matrices with an iterator. E.g.
In [1]: X = Matrix(3, 3, range(9))
In
Comment #11 on issue 771 by julien.r...@gmail.com: Matrix equations
http://code.google.com/p/sympy/issues/detail?id=771
Don't know, but that's just what it does (the code at the top of solve is
rather twisted!). So as it turns out, solve([A*B - C]) does not work (but I
think it should, and i
Comment #10 on issue 771 by asmeu...@gmail.com: Matrix equations
http://code.google.com/p/sympy/issues/detail?id=771
Why is Eq(A*B, C) converted to [A*B - C] instead of just A*B - C? It seems
like that is the real issue here.
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Comment #1 on issue 3655 by asmeu...@gmail.com: nan in compute_innermost
http://code.google.com/p/sympy/issues/detail?id=3655
The issue is that the sort key on nan is wrong:
In [20]: sorted([S.NaN, 0], key=default_sort_key)
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Comment #4 on issue 3083 by rishabhd...@gmail.com: Not is still vectorized
http://code.google.com/p/sympy/issues/detail?id=3083
https://github.com/sympy/sympy/pull/1783
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Comment #6 on issue 3646 by prasoon9...@gmail.com: Weird solution of x**y =
0
http://code.google.com/p/sympy/issues/detail?id=3646
Yes, plenty of tests still fail. As I mentioned above, these tests somehow
implicitly depend upon the fact that 0**x != 0.
As a matter of fact, some of the fail
Comment #8 on issue 3638 by asmeu...@gmail.com: Automatic series expansion
while applying a function?
http://code.google.com/p/sympy/issues/detail?id=3638
But we already do things like that for
factorial(factorial(1000))!
Good point. We should rethink that one. Wh
Comment #4 on issue 3615 by asmeu...@gmail.com: Test failure with numpy
1.7.0
http://code.google.com/p/sympy/issues/detail?id=3615
See https://github.com/numpy/numpy/issues/3004.
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Comment #2 on issue 1996 by manojkum...@gmail.com: Incorrect exception in
dsolve()
http://code.google.com/p/sympy/issues/detail?id=1996
Ive attempted to solve this issue. Do look at the code.
https://github.com/sympy/sympy/pull/1803
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Updates:
Status: Started
Owner: julien.r...@gmail.com
Labels: NeedsReview
Comment #8 on issue 1428 by julien.r...@gmail.com: wrong result for
integral of sin(k*x)*sin(m*x) over [0,pi]
http://code.google.com/p/sympy/issues/detail?id=1428
https://github.com/sympy/sympy/p
Updates:
Owner: julien.r...@gmail.com
Labels: NeedsReview
Comment #9 on issue 771 by julien.r...@gmail.com: Matrix equations
http://code.google.com/p/sympy/issues/detail?id=771
solve(A*B - C, [a, b, c, d]) works because the Matrix is directly iterated
over as if it was a system
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