Comment #2 on issue 1714 by trel...@psu.edu: some sum problems
http://code.google.com/p/sympy/issues/detail?id=1714
This is out-of-date. Currently,
In [1]: sum(2*f(k),(k,0,n))
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TypeError
Comment #21 on issue 2639 by trel...@psu.edu: Product() is seriously broken
http://code.google.com/p/sympy/issues/detail?id=2639
I have a pull-request in that handles automatic denesting of Sum and
Product.
https://github.com/sympy/sympy/pull/2198
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Comment #6 on issue 3662 by trel...@psu.edu: Sum and Integral (and possibly
Product) should have a common superclass
http://code.google.com/p/sympy/issues/detail?id=3662
I have a pull request in on this. See
https://github.com/sympy/sympy/pull/2198
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Comment #2 on issue 4002 by chem...@gmail.com: Factorizing rational
functions
http://code.google.com/p/sympy/issues/detail?id=4002
I think I did not explain myself properly. In my humble opinion, but I am
not an english speaker, I think that a z*(z-1) in the denominator is not
factorized,
Comment #5 on issue 3229 by trel...@psu.edu: print should not use evalf
http://code.google.com/p/sympy/issues/detail?id=3229
see https://github.com/sympy/sympy/pull/2406
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Comment #3 on issue 4002 by asmeu...@gmail.com: Factorizing rational
functions
http://code.google.com/p/sympy/issues/detail?id=4002
z*(z - 1) *is* factored. It's the factorization of z**2 - z.
And this is the expected behavior, that both the numerator and denominator
factor.
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Comment #4 on issue 4002 by chem...@gmail.com: Factorizing rational
functions
http://code.google.com/p/sympy/issues/detail?id=4002
But the results from factor(z) where z**2 - z in the previous version, and
also in the numerator, it is presented in a z**2 - z equivalent way. So I
think I a
Comment #3 on issue 1714 by asmeu...@gmail.com: some sum problems
http://code.google.com/p/sympy/issues/detail?id=1714
In these old issues, replace "sum" with "summation".
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Comment #5 on issue 4002 by asmeu...@gmail.com: Factorizing rational
functions
http://code.google.com/p/sympy/issues/detail?id=4002
The numerator is factored. factor() only factors the whole thing, so your
polynomial, which is something like a*z**2 + b*z + c is not factored.
Partial facto
Comment #3 on issue 4003 by spoo...@abv.bg: Cannot return general quartic
solution
http://code.google.com/p/sympy/issues/detail?id=4003
Well if all of the coefficients are not zero, the general solution (
https://upload.wikimedia.org/wikipedia/commons/9/99/Quartic_Formula.svg )
should wor
Comment #6 on issue 4002 by chem...@gmail.com: Factorizing rational
functions
http://code.google.com/p/sympy/issues/detail?id=4002
I think the factoring is done the other way round. So if you had something
like (z+a)*(z+b) making a factor(z) you got z**2+(a+b)*z+a*b, which is the
one show
Comment #2 on issue 3998 by ness...@googlemail.com: summation(x**n/n, (n,
1, 400)) hangs
http://code.google.com/p/sympy/issues/detail?id=3998
Well the issue boils down to the fact that eval_sum, in line 545, "just
does the sumamtion" if there are less than a hundred terms. This is why it
Updates:
Labels: Simplify
Comment #7 on issue 4002 by asmeu...@gmail.com: Factorizing rational
functions
http://code.google.com/p/sympy/issues/detail?id=4002
No, factor should definitely give something like (z - a)*(z - b). See
https://en.wikipedia.org/wiki/Factorization. What you w
Updates:
Status: Valid
Comment #1 on issue 4007 by asmeu...@gmail.com: Incorrect Real & Imaginary
parts of Irrational functions
http://code.google.com/p/sympy/issues/detail?id=4007
As I noted on the mailing list, the Mul.as_real_imag function is not being
general enough to handle th
Updates:
Status: Valid
Cc: ness...@googlemail.com
Labels: WrongResult Integration
Comment #1 on issue 3999 by asmeu...@gmail.com: Incorrect expression
resulting from integral evaluation
http://code.google.com/p/sympy/issues/detail?id=3999
Something fishy is going on he
Comment #2 on issue 3999 by asmeu...@gmail.com: Incorrect expression
resulting from integral evaluation
http://code.google.com/p/sympy/issues/detail?id=3999
By the way, I'm using Python 3.3, so this is probably hash randomization
related.
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Updates:
Cc: ondrej.c...@gmail.com
Comment #1 on issue 3997 by asmeu...@gmail.com: limit(x**-pi, x, 0, dir='-')
http://code.google.com/p/sympy/issues/detail?id=3997
(No comment was entered for this change.)
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Comment #2 on issue 3997 by ondrej.c...@gmail.com: limit(x**-pi, x, 0,
dir='-')
http://code.google.com/p/sympy/issues/detail?id=3997
This needs to be fixed in gruntz either way. Gruntz() must always return
correct values, although sometimes it might be slower.
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