Updates:
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Comment #3 on issue 2223 by Vinzent.Steinberg: Rename top level
apply_operators to qapply
http://code.google.com/p/sympy/issues/detail?id=2223
(No comment was entered for this change.)
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Status: Fixed
Comment #4 on issue 2223 by Vinzent.Steinberg: Rename top level
apply_operators to qapply
http://code.google.com/p/sympy/issues/detail?id=2223
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Status: Fixed
Comment #4 on issue 2000 by Vinzent.Steinberg: Inconsistencies with limit()
http://code.google.com/p/sympy/issues/detail?id=2000
This is in.
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Comment #11 on issue by pr...@goodok.ru: Matrix([Matrix, ...]) should
check the row length of empty matrices
http://code.google.com/p/sympy/issues/detail?id=
Yes, I mean slicing.
Now I see that all variants of usage and generalization must be examined
deeper. (I also have not look
Comment #9 on issue 828 by gdrummo...@gmail.com: In sympy.geometry many
docstrings are not good enough
http://code.google.com/p/sympy/issues/detail?id=828
I'll fix the Triangle docstrings.
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Comment #5 on issue 950 by pr...@goodok.ru: put all _sage_ methods to one
place
http://code.google.com/p/sympy/issues/detail?id=950
As I understand the same (about Ronan's "Having to hack the core") is with
_pretty_ and so on. Is not this?
I cite the old correspondence (the answer of Aaro
Comment #9 on issue 341 by ness...@googlemail.com: sympy-merge: matrices:
dirac conjugation is broken
http://code.google.com/p/sympy/issues/detail?id=341
physics/matrices.py provides a working replacement for Pauli called msigma.
Whereas pauli tries to implement the pauli algebra directly (a
Comment #4 on issue 2224 by mrock...@gmail.com: Number('5').__class__ ==
Real
http://code.google.com/p/sympy/issues/detail?id=2224
Issued pull request through github.
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Owner:
Labels: Type-Defect Priority-Medium
New issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
Currently the norm function on matrices only works for rows or columns (1d
matrices) and only performs the 2-norm
norm(x
Comment #3 on issue 1242 by pr...@goodok.ru: Simplifying of complex
exponentials
http://code.google.com/p/sympy/issues/detail?id=1242
Yes, I indicate that this works in current SymPy.
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Comment #4 on issue 1935 by pr...@goodok.ru: Sum doesn't rebuild itself
http://code.google.com/p/sympy/issues/detail?id=1935
I indicate that this works in current SymPy now:
>>> expr = Sum(x**k, (k,1,5), (x,0,9))
>>> expr
Sum(x**k, (k, 1, 5), (x, 0, 9))
>>> expr.func(*expr.args
Comment #1 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
A few of the matrix norms seem to depend on undeveloped machinery (i.e.
SVD). Is it best to throw NotImplementedErrors or to wait on this all
together?
Can anyone think
Comment #3 on issue 1456 by dah4...@gmail.com: use pyflakes to identify
simple bugs in sympy and fix them
http://code.google.com/p/sympy/issues/detail?id=1456
I was going to make a patch but I got really lazy. here is my pyflakes
output with some of the correct but misidentified things remo
Comment #2 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
Ah, so one method of computing SVD is to compute the eigenvalue
decomposition of A^T*A and A*A^T (in real setting). Should this be
implemented? Is this terribly slow? I'
Comment #12 on issue by asmeurer: Matrix([Matrix, ...]) should check
the row length of empty matrices
http://code.google.com/p/sympy/issues/detail?id=
You might also look at http://en.wikipedia.org/wiki/Empty_matrix.
To quote the MATLAB docs you cited:
"The basic model for empty ma
Updates:
Labels: NeedsReview MRocklin
Comment #5 on issue 2224 by asmeurer: Number('5').__class__ == Real
http://code.google.com/p/sympy/issues/detail?id=2224
In the future, make a note of the pull request number here on the issue.
This one is at https://github.com/sympy/sympy/pull/15
Comment #4 on issue 1242 by asmeurer: Simplifying of complex exponentials
http://code.google.com/p/sympy/issues/detail?id=1242
Is the behavior tested? If so, then this can be closed.
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Status: Fixed
Comment #5 on issue 1935 by asmeurer: Sum doesn't rebuild itself
http://code.google.com/p/sympy/issues/detail?id=1935
I think this was fixed with issue 2070.
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Comment #13 on issue by pr...@goodok.ru: Matrix([Matrix, ...]) should
check the row length of empty matrices
http://code.google.com/p/sympy/issues/detail?id=
Thanks, I understand the model now, but it seems that it is extension.
May be similar as complex extends reals or other fiel
Comment #5 on issue 1242 by pr...@goodok.ru: Simplifying of complex
exponentials
http://code.google.com/p/sympy/issues/detail?id=1242
In current master:
In [1]: c = cos(x)._eval_rewrite_as_exp(x)
In [2]: t = tan(x)._eval_rewrite_as_exp(x)
In [3]: simplify(c*t)
In [1]: c = cos(x)._eval_rew
Comment #3 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
Pull request issued
https://github.com/sympy/sympy/pull/156
Included is Matrix.norm, Matrix.singular_values, Matrix.condition_number
I didn't include the main SVD work. I'
Comment #5 on issue 2225 by p...@goodok.ru: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
I have looked at the code (one eye), nice.
Some *preliminary* remarks, I put there
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Comment #4 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
Sent in a Pull request
https://github.com/sympy/sympy/pull/156
This includes work on Matrix.norm, Matrix.singular_values, and
Matrix.condition_number
I left the main SV
Status: Accepted
Owner: ronan.l...@gmail.com
Labels: Type-Defect Priority-Medium EasyToFix
New issue 2226 by ronan.l...@gmail.com: Test failure for tsolve()
http://code.google.com/p/sympy/issues/detail?id=2226
I've had a test failure for some time in sympy/solvers, cf.
http://paste.pocoo.org/s
Comment #6 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
Response to an e-mail comment.
I chose to make the standard matrix norm the spectral norm. This matches
the standard vector 2-norm mathematically. The spectral norm is th
Updates:
Status: NeedsDecision
Labels: NeedsReview MRocklin
Comment #7 on issue 2225 by asmeurer: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
Maybe someone with more knowledge of it could decide about that norm thing.
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Comment #8 on issue 2225 by p...@goodok.ru: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
I am not sure about what to do now, I just rise up question. I will answer
tomorrow.
And do not worry, as I begin to discuss your GitHub pull request I
automaticaly joind
Updates:
Summary: Setup buildbot (again)
Labels: -Priority-Medium Priority-Critical
Comment #8 on issue 1117 by ronan.l...@gmail.com: Setup buildbot (again)
http://code.google.com/p/sympy/issues/detail?id=1117
I'm raising the priority on this. Stuff like this is just too embarras
Comment #9 on issue 2225 by sherjilo...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
This approach only works for purely numerical matrices.
Check out sympy/mpmath/matrices/matrices.py
That is the library that deals with numeric matrices. Any numeric
al
Comment #10 on issue 2225 by asmeurer: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
You should not edit the mpmath files. mpmath is a separate library that we
include with SymPy, so any changes there should be backported to mpmath.
This change actually does bel
Comment #2 on issue 2186 by lazov...@gmail.com: X, Y, Z gates should be
hermitian as well as unitary
http://code.google.com/p/sympy/issues/detail?id=2186
I've been looking at this issue but have a small question. Is the solution
to this as simple as having the XGate, YGate, and ZGate classe
Comment #11 on issue 2225 by sherjilo...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
@asmeurer: I don't think there is such a thing as symbolic norms. Correct
me if I'm wrong.
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Comment #12 on issue 2225 by asmeurer: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
Certainly there are. They are as defined in the OP. So, for example, the 2
norm of the vector [x, y, z] is sqrt(x**2 + y**2 + z**2). Just about
anything in mathematics that can
Comment #13 on issue 2225 by sherjilo...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
What I mean is, Norms make sense only when the matrix is completely known,
and thus when it is purely numerical. 'Norm' aims to associate a number
with a matrix that
Comment #14 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
I e-mailed this to the list, it doesn't appear to be coming up. I apologize
if a repeat post happens.
Example:
Spectral norm of a matrix (standard 2-norm) can be define
Comment #15 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
To be clear I don't think this will often be useful (except for simple
educational cases). As long as we have the ability to compute eigenvalues
symbolically though why
Comment #16 on issue 2225 by sherjilo...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
"As long as we have the ability to compute eigenvalues symbolically"
Could you elaborate what you mean by this ?
You're right that's not much code, but we do have to c
Comment #17 on issue 2225 by sherjilo...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
OK, I get what you mean by "As long as we have the ability to compute
eigenvalues symbolically"
Yeah, I'd let the core team decide if this is important enough to be
Comment #19 on issue 2225 by mrock...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
I think it can be useful. Remember that CASs like SymPy can handle easily
very large symbolic expressions that you could never feasibly handle by
hand. Also, just bec
Comment #17 on issue 2081 by ffxvzero: Pow substitution introduces wrong
answers
http://code.google.com/p/sympy/issues/detail?id=2081
hi guys,
an openrave rpm package for fedora core will be released soon, which relies
on this bug being fixed.
https://bugzilla.redhat.com/show_bug.cgi?id=
Updates:
Cc: smi...@gmail.com
Labels: -Priority-Medium Priority-High
Comment #18 on issue 2081 by asmeurer: Pow substitution introduces wrong
answers
http://code.google.com/p/sympy/issues/detail?id=2081
If someone fixes it before then, it will. I'll raise the priority for
y
Comment #20 on issue 2225 by ronan.l...@gmail.com: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
I think both Sherjil and Matthew make good points here. There are cases
where you want .norm() to return an explicit result but if you consider a
100*100 matrix with
Comment #1 on issue 2220 by sean.v@gmail.com: Bug with
Matrix.is_symbolic and Matrix.is_upper
http://code.google.com/p/sympy/issues/detail?id=2220
See https://github.com/sympy/sympy/pull/157
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New issue 2227 by markdew...@gmail.com: Numerical integration of 2 and 3
dimensional integrals
http://code.google.com/p/sympy/issues/detail?id=2227
Sympy only handles 1-D integrals numerically. The underlying mpmath
functions can
Comment #21 on issue 2225 by pr...@goodok.ru: Enhancing Matrix Norm
http://code.google.com/p/sympy/issues/detail?id=2225
For even very simple matrices they're often hideous.
But for many collections of matrices (and for many objects), one might
could say for group of them, the norm (of app
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