Comment #5 on issue 2043 by smichr: expand log can be more complete
(was logcombine can be less strict)
http://code.google.com/p/sympy/issues/detail?id=2043
Instead of patching code to be symbolic, why don't we just have a function
to make all vanilla symbols take on whatever property is
Updates:
Summary: log should not expand(1/x) (was expand log can be more complete
and logcombine can be less strict)
Comment #6 on issue 2043 by smichr: log should not expand(1/x) (was expand
log can be more complete and logcombine can be less strict)
Comment #10 on issue 1919 by mattpap: unify behavior of var() and symbols()
http://code.google.com/p/sympy/issues/detail?id=1919
In my branch (polys11) I unified var() and symbols(), so that those two
functions have exactly the same semantics + var() modifies current
namespace (as
Status: Accepted
Owner: smichr
Labels: Type-Defect Priority-Medium
New issue 2044 by smichr: log(exp(x)) != x unless x is real
http://code.google.com/p/sympy/issues/detail?id=2044
I see the following comment in the code or exponential.py:
+#this doesn't work due to caching: :(
+
Comment #11 on issue 1919 by smichr: unify behavior of var() and symbols()
http://code.google.com/p/sympy/issues/detail?id=1919
Did you give any consideration to the syntax var('a1:3') - a1, a2, a3?
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Updates:
Labels: mattpap
Comment #12 on issue 1919 by asmeurer: unify behavior of var() and symbols()
http://code.google.com/p/sympy/issues/detail?id=1919
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Labels: NeedsReview smichr
Comment #7 on issue 2043 by asmeurer: log should not expand(1/x)
(was expand log can be more complete and logcombine can be less strict)
http://code.google.com/p/sympy/issues/detail?id=2043
Making all symbols positive is not sufficient to do all
Updates:
Labels: Ronan.Lamy
Comment #2 on issue 1969 by asmeurer: Matrix.LUdecompositionFF() fails for
some inputs
http://code.google.com/p/sympy/issues/detail?id=1969
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Updates:
Labels: mattpap
Comment #2 on issue 1974 by asmeurer: Poly(1).subs traceback
http://code.google.com/p/sympy/issues/detail?id=1974
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Labels: asmeurer
Comment #4 on issue 1989 by asmeurer: Remove depricated Matrix functions
http://code.google.com/p/sympy/issues/detail?id=1989
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Labels: -Type-Patch Type-Defect smichr
Comment #14 on issue 666 by asmeurer: sorting of expressions makes
subs_dict() fail
http://code.google.com/p/sympy/issues/detail?id=666
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Comment #2 on issue 2044 by smichr: log(exp(x)) != x unless x is real
http://code.google.com/p/sympy/issues/detail?id=2044
yes, uncommenting that line makes the true conditions for simplification
apply and then the code breaks.
Again, here is a perfect place for symbols to be used
Updates:
Cc: mattpap
Labels: smichr
Comment #73 on issue 966 by asmeurer: Can't simplify exp(2 * pi * I * a)
when a is integer
http://code.google.com/p/sympy/issues/detail?id=966
This should be expanded to make exp(I*pi*rational_number) work (i.e.,
return the root of
Updates:
Labels: felix.kaiserfxkr.net
Comment #6 on issue 1265 by asmeurer: +oo pi
http://code.google.com/p/sympy/issues/detail?id=1265
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Labels: nicolas.pourcelot smichr
Comment #142 on issue 1694 by asmeurer: solve has many issues with fractions
http://code.google.com/p/sympy/issues/detail?id=1694
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Labels: asmeurer
Comment #13 on issue 1758 by asmeurer: fix curvilinear_coordinates example
output
http://code.google.com/p/sympy/issues/detail?id=1758
I guess still remaining for review here was my commit using lamda instead
of lambda. Also, since then, pretty printing
Comment #8 on issue 2043 by smichr: log should not expand(1/x) (was expand
log can be more complete and logcombine can be less strict)
http://code.google.com/p/sympy/issues/detail?id=2043
ahh...I see. On the other hand log((x-y)*(x+y)) would still split because
the x+y is positive. But
Comment #3 on issue 2044 by asmeurer: log(exp(x)) != x unless x is real
http://code.google.com/p/sympy/issues/detail?id=2044
Well, the last time I made a change that broke something in the limits
(prevention of automatic combination of exp(x)*exp(y) = exp(x + y)), I had
to write a custom
Updates:
Labels: smichr
Comment #68 on issue 1766 by asmeurer: expand(power_base=True) is too
aggressive
http://code.google.com/p/sympy/issues/detail?id=1766
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Status: New
Owner:
Labels: Type-Defect Priority-Medium
New issue 2045 by michelelacchia: djtheta test fail
http://code.google.com/p/sympy/issues/detail?id=2045
python '/usr/lib/pymodules/python2.6/mpmath/tests/runtests.py' -psyco
test_basic_ops
add ok
Comment #4 on issue 2044 by smichr: log(exp(x)) != x unless x is real
http://code.google.com/p/sympy/issues/detail?id=2044
It could be something like iknowwhatimdoing_funcdenest?
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Comment #12 on issue 1799 by smichr: Replace exp(x) with E**x internally
http://code.google.com/p/sympy/issues/detail?id=1799
I think that perhaps the way to do this is leave exp alone. It has several
methods that would become messy to handle--just my hunch. How about this,
though:
1)
Updates:
Cc: fredrik.johansson
Comment #1 on issue 2045 by asmeurer: djtheta test fail
http://code.google.com/p/sympy/issues/detail?id=2045
Can this be reproduced specifically with the sympy mpmath install?
Otherwise, I think you should report this at the mpmath Google Code issue
Comment #13 on issue 1799 by asmeurer: Replace exp(x) with E**x internally
http://code.google.com/p/sympy/issues/detail?id=1799
Somehow, it seems that it would be less messy to special case E all over
Pow than to special case Pow vs. exp() all over the entire codebase.
is_pow would make
Comment #5 on issue 2044 by asmeurer: log(exp(x)) != x unless x is real
http://code.google.com/p/sympy/issues/detail?id=2044
Well, in UNIX lingo that would be sudo_funcdenest() :)
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