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Comment #12 on issue 1495 by smichr: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
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Owner: smichr
Cc: ondrej.certik
Comment #9 on issue 1495 by smichr: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
The patch attached here updates _extract_minus and includes tests.
/c
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Comment #8 on issue 1495 by asmeurer: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
The application process for Google Summer of Code begins around April, and
the projects themselves run in
the summer time (such as my project, which is ODEs). See also the GSoC
main
Comment #6 on issue 1495 by smichr: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
suggested changes have been made and last 3 patches merged. The new branch
has been
pushed -f to http://github.com/smichr.
/c
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Comment #7 on issue 1495 by smichr: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
When sympy recognizes cyclotomic polynomials, the solution will be even
shorter for
things like x^4+x^3+x^2+x+1=0. See the excellent article at google books:
http://tinyurl.com/ldcaq7
Updates:
Cc: asmeurer
Comment #4 on issue 1495 by smichr: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
This is a new fix to the issue that doesn't break anything and that fixes
the
infinite recursion encountered with
var('a x')
(x*(-2*a*x -
Comment #5 on issue 1495 by asmeurer: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
This looks good, except I am not sure how I feel about right justifying the
docstrings. Also, your first commit
adds whitespace errors, which it looks like your second commit fixes. You
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Comment #2 on issue 1495 by smichr: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
I got an infinite recursion from could_extract_minus_sign() when checking
the
expression: x*(-2*a*x - 2*x**3).
I also note that the
Status: Accepted
Owner:
Labels: Type-Defect Priority-Medium
New issue 1495 by ondrej.certik: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
There is a minus problem see here:
http://paste.blixt.org/109696
and here:
http://paste.blixt.org/113599
it needs to be
Comment #1 on issue 1495 by ryanlists: minus problem
http://code.google.com/p/sympy/issues/detail?id=1495
I think Ondrej's version is right and mine is wrong: (-t-n*t)/n can extract
a minus
sign from the numerator. I step through could_extract_minus_sign using Pdb
and here
are the key
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