Updates:
Cc: Vinzent.Steinberg
Comment #17 on issue 2039 by smichr: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
I believe it's ready to look at again.
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Comment #18 on issue 2039 by asmeurer: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
Here's a simple example. The smallest non-abelian (non-commutative) group
is S3, the group of permutations on 3 elements. You can see from the
multiplication table at
Comment #4 on issue 2014 by torstenm...@googlemail.com:
sympy.solvers.solvers.solve should also allow frozenset to hold equations
http://code.google.com/p/sympy/issues/detail?id=2014
Sorry for the delay. Attached is the diff file replacing most of the
remaining isinstance(x,(list, tuple))
Status: Accepted
Owner: asmeurer
CC: mattpap
Labels: Type-Enhancement Priority-Medium Polynomial
New issue 2042 by asmeurer: Frac() object for rational function arithmetics
http://code.google.com/p/sympy/issues/detail?id=2042
I've been thinking about this for a while now, so I figured I would
Updates:
Labels: NeedsReview
Comment #5 on issue 2014 by asmeurer: sympy.solvers.solvers.solve should
also allow frozenset to hold equations
http://code.google.com/p/sympy/issues/detail?id=2014
You can fix the test_whitespace failure using the strip_whitespace utility
in the bin
Comment #19 on issue 2039 by smichr: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
(I looked at the page but don't see where f denotes a square root...do you
get that from the Cayley Table page where f**2 = d so f = sqrt(d)?)
Regarding the power rules, you
Comment #20 on issue 2039 by asmeurer: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
Yes, you are right (I didn't notice d there). That is a multiplication
table, so a*b = b, b*a = f, a**2 = e, b**2 = e, etc (I might have it
backwards, but it doesn't matter).
Comment #21 on issue 2039 by smichr: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
Sigh...I even made a crib sheet for myself listing power and log rules. But
I made the mistake. I hoped to be encouraged that I got it right in
powdenest, but alas, no:
from
Comment #22 on issue 2039 by asmeurer: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
Yes, powdenest() will be useless (to me at least) unless it can ignore
assumptions and reduce things like sqrt(x**2). Making it like logcombine()
with the assume_pos_real hint
Updates:
Labels: -NeedsReview NeedsBetterPatch
Comment #6 on issue 2014 by asmeurer: sympy.solvers.solvers.solve should
also allow frozenset to hold equations
http://code.google.com/p/sympy/issues/detail?id=2014
You should add tests. There at least needs to be a test for frozenset
Comment #140 on issue 1694 by sophie.duriez: solve has many issues with
fractions
http://code.google.com/p/sympy/issues/detail?id=1694
Thanks for your review Chris.
(x**y)**a is not, in general, x**(y*a).
Indeed. Thanks for catching it.
This routine, however, inspired a fixed routine that
Comment #141 on issue 1694 by nicolas.pourcelot: solve has many issues with
fractions
http://code.google.com/p/sympy/issues/detail?id=1694
Thanks for your review Chris.
(x**y)**a is not, in general, x**(y*a).
Indeed. Thanks for catching it.
This routine, however, inspired a fixed routine
Comment #23 on issue 2039 by smichr: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
There's no separate issue. I needed such a function for the Mul._eval_subs
to standardize the input a little. I guess I could leave it out and leave
*all* prep work to the
Comment #24 on issue 2039 by smichr: Mul.eval_subs problems
http://code.google.com/p/sympy/issues/detail?id=2039
I'm not sure right now how powsimp and powdenest fit together...if you have
ideas I'm listening. I'll be thinking about it.
I made powdenest respect assumptions that are already
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