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
Status: New
Owner:
Labels: Type-Defect Priority-Medium
New issue 2020 by chr.schu...@gmx.de: Symbols Matrices
http://code.google.com/p/sympy/issues/detail?id=2020
Hi,
I was wondering whether it is planned to implement matrix support for
symbols. I often use symbolic calculation for
Comment #125 on issue 1694 by nicolas.pourcelot: solve has many issues with
fractions
http://code.google.com/p/sympy/issues/detail?id=1694
Ok, Chris, I've seen your patch (sympy/functions/elementary/exponential.py).
class log(Function):
...
def as_numer_denom(self):
n, d =
Comment #126 on issue 1694 by nicolas.pourcelot: solve has many issues with
fractions
http://code.google.com/p/sympy/issues/detail?id=1694
More generally, is there cases where log expansion is useful for
numerator/denominator decomposition ?
I suppose there is because of current code,
Comment #127 on issue 1694 by nicolas.pourcelot: solve has many issues with
fractions
http://code.google.com/p/sympy/issues/detail?id=1694
What's more, if I simply remove specific log.as_numer_denom() method:
1. all sympy tests pass - with some minor modifications, because of the
Comment #128 on issue 1694 by nicolas.pourcelot: solve has many issues with
fractions
http://code.google.com/p/sympy/issues/detail?id=1694
With log.as_numer_denom() removed, and test_ode.py/test_solver.py adapted.
(This patch must be applied on top of the previous).
Attachments:
Updates:
Status: Accepted
Cc: christian.muise
Labels: Matrices Assumptions
Comment #1 on issue 2020 by asmeurer: Symbols Matrices
http://code.google.com/p/sympy/issues/detail?id=2020
For eq1, yes, I think we should add support for that. As the third thing
suggests,
Comment #129 on issue 1694 by asmeurer: solve has many issues with fractions
http://code.google.com/p/sympy/issues/detail?id=1694
The only thing I can think of is that log(a**(1/b)) == log(a)/b. But I
might even consider that to be kind of obscure. So definitely +1 on
removing that
Comment #130 on issue 1694 by asmeurer: solve has many issues with fractions
http://code.google.com/p/sympy/issues/detail?id=1694
Actually, (x*(x + 1) + x**2)/x**3. It shouldn't be calling expand() or
cancel() either (which it doesn't, but just to be clear on it).
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Comment #2 on issue 2020 by christian.muise: Symbols Matrices
http://code.google.com/p/sympy/issues/detail?id=2020
Depends on what you define the new assumptions model to be -- since
they're just symbols, they should be dispatching the is_commutative to the
global_assumptions to check
Comment #12 on issue 1923 by nicolas.pourcelot: count_ops doesn't return a
count (by default)
http://code.google.com/p/sympy/issues/detail?id=1923
(visual=True is missing in last comment suggestion)
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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
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