Updates:
Status: Fixed
Comment #25 on issue 2015 by smi...@gmail.com: Hangs attempting to solve a
system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
Although a different method in polys may replace the work that has been
done, the symptom of slow
Updates:
Labels: NeedsReview smichr
Comment #24 on issue 2015 by smi...@gmail.com: Hangs attempting to solve a
system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
I made a PR with this change at https://github.com/sympy/sympy/pull/2755
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Comment #23 on issue 2015 by smi...@gmail.com: Hangs attempting to solve a
system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
It seems that the method of finding determinants of minors is actually very
good for a sparse system like this since minors of elements
Comment #20 on issue 2015 by matt...@gmail.com: Hangs attempting to solve a
system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
I did some experimentation and using solve_lin_sys() from #1850 and sparse
rational functions from sparse-polys branch I was able to
Comment #21 on issue 2015 by asmeu...@gmail.com: Hangs attempting to solve
a system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
That's great. Aside from the basic slowdown of the dense representation for
multivariate polynomials, and the infamous expand call,
Comment #22 on issue 2015 by matt...@gmail.com: Hangs attempting to solve a
system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
I pushed the experimental solver to sparse-polys and reduced computation
times to 0.35 and 1.1 seconds (simplified, original).
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Comment #19 on issue 2015 by smi...@gmail.com: Hangs attempting to solve a
system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
For anyone who happens across this page, just a note that until other
improvements are made, there is a 'manual' flag in solve that
Updates:
Labels: -Milestone-Release0.7.2
Comment #17 on issue 2015 by asmeu...@gmail.com: Hangs attempting to solve
a system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
If this requires sparse polys to work, then there's no point in having a
blocking
Comment #16 on issue 2015 by smi...@gmail.com: Hangs attempting to solve a
system of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
both the original system and just the numereators of the same appear to
hang in the new solver.
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Comment #13 on issue 2015 by mattpap: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
This is partially related to polys, because making this fast requires
implementation of sparse polynomials, which won't happen before 0.7.0.
Updates:
Labels: -Milestone-Release0.7.0 Milestone-Release0.7.1
Comment #14 on issue 2015 by asmeurer: Hangs attempting to solve a system
of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
Postponing then.
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Comment #11 on issue 2015 by asmeurer: Hangs attempting to solve a system
of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
Mateusz, you marked this as Milestone-Release0.7.0. Did you plan on doing
anything with this?
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Comment #12 on issue 2015 by smichr: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
I don't think this is polys related. Commit b999dd3b6f03c190fdba4
(1809, 1716: extraction changes) makes the modified system solve very
quickly.
Comment #7 on issue 2015 by smichr: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
On my fairly modest system this takes about 16 seconds to do with the code
appended below:
for k,v in soln.items():
... print k,
Comment #8 on issue 2015 by asmeurer: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
It seems like that sort of thing would be easier to do using Matrix
operations.
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Comment #9 on issue 2015 by smichr: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
In theory, it seems.
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Updates:
Cc: asmeurer
Comment #10 on issue 2015 by smichr: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
I checked this in t2 which uses traditional Matrix methods and it takes
only 4X longer (60 seconds) rather than
Updates:
Owner: mattpap
Labels: Polynomial Milestone-Release0.7.0
Comment #6 on issue 2015 by mattpap: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
(No comment was entered for this change.)
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Comment #4 on issue 2015 by ggventurini: Hangs attempting to solve a system
of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
Hello, thanks again for your time.
I understand the solution is a complex one, but I would say not so complex
to justify 12h execution time.
Comment #2 on issue 2015 by ggventurini: Hangs attempting to solve a system
of linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
Thanks for looking into this.
I am sorry about the pickle file, it works on my machine, I don't know what
is up exactly.
I will try and
Updates:
Cc: fredrik.johansson
Comment #3 on issue 2015 by asmeurer: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
The pickle file is probably a sympy bug, but I know almost nothing about
pickling, so I can't say or do
Updates:
Status: Accepted
Labels: Solvers Simplify
Comment #1 on issue 2015 by asmeurer: Hangs attempting to solve a system of
linear equations
http://code.google.com/p/sympy/issues/detail?id=2015
I couldn't get the pickling to work (ValueError: invalid digits), but that
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