1. create a new method for testing the antisymmetry of a matrix: new
is_anti_symmetric() method
This sounds good to me.
2. create a new method for calculating the symbolic determinant using LU
decomposition: new det_lu_decomposition() method
This also sounds good to me. Is anyone
Hi Matt,
Yes I will take a more serious look at the workflow. I have not much
used IRC except to chat with my sons (one soon to be a professor at
Indiana University and one living in Temecula Ca). But clearly it can
be much more efficient. I am just a bit hesitant in wasting others
time. Am
Hi,
I hope this is already clear, but I don't think you will be wasting
anyone's time. The sympy community is very embracing and interested in
all contributions. I would suggest you simply open a pull request (once
you learn how to do so :-) ) and we discuss details of your code there.
On
I forgot to say something about the dual of a matrix. In my present
context in the ipython notebooks I am using the following definition:
Given a 4x4 antisymmetric matrix F (so F_{ab} = - F_{ba}) the dual to
F is defined to be
\sideset{^{*}}{^{ab}}{\mathbf{F}} =\frac{1}{2}
I wonder if any of the tensor and/or quantum algebra code would be
helpful to use? (I have never used any of it myself but I would think
this sort of object is fairly common.)
On 27.03.2012 18:02, Comer Duncan wrote:
I forgot to say something about the dual of a matrix. In my present
context
Hi Tom,
Thanks for the reply. I have taken a cursory look at the quantum stuff
and do not think at present that there is much overlap. My use of
dual is in the context of cartesian coordinate components of the
antisymmetric 2nd rank tensor. The tensor and its dual really live in
different
Oh yes, I wasn't suggesting it is not a good thing, just that maybe you
might find good stuff there that is useful to you. For example I would
be surprised if there wasn't an implementation of the levi-civita symbol
somewhere around there.
On 27.03.2012 18:45, Comer Duncan wrote:
Hi Tom,
There has been some talk about creating a more dedicated tensor module.
Perhaps this is the sort of thing that would be implemented there. Stefan
Krastanov and I both seem interested in this topic. Stefan was thinking
about turning this into a GSoC project. If this doesn't happen I'll
probably
On Tue, Mar 27, 2012 at 11:42 PM, Tom Bachmann e_mc...@web.de wrote:
Oh yes, I wasn't suggesting it is not a good thing, just that maybe you
might find good stuff there that is useful to you. For example I would be
surprised if there wasn't an implementation of the levi-civita symbol
Hi Chris,
Oh yes, I wasn't suggesting it is not a good thing, just that maybe you
might find good stuff there that is useful to you. For example I would be
surprised if there wasn't an implementation of the levi-civita symbol
somewhere around there.
from the docstring in
Hi Matt,
Actually a couple of years ago Alan Bromborsky made nontrivial
progress at developing sympy tensor analysis. I talked to him a few
times about his development and tried out some things myself. Alan is
the developer of the GA module and made quite good progress. There
were some needs for
On Wed, Mar 28, 2012 at 12:06 AM, Comer Duncan comer.dun...@gmail.comwrote:
Hi Chris,
I have used this in my little implementation of the dual. Actually, I
first wrote my own Levi-Civita function only to discover later that it
is already done and in the tensor_functions module. Thanks for
Chris,
Yes grep is a good thing. I have been using it since the 1980s when I
first started using unix.
I am now starting to confront getting knowledge of git...
I have a github account, have been using the git master of sympy for
several weeks and do a git pull every once in a while. For the
What you want to do is create a new branch, not a new fork. You can
achieve this with the command
git checkout -b new_branch_name
Anything you do here will be done in the branch. You can switch back
and forth between branches with
git checkout branch_name
The default branch is master, so to
Hi Aaron,
You can
achieve this with the command
git checkout -b new_branch_name
Yes, but do I do that from another directory than
/Users/comerduncan/sympy where I have my current master cloned a
while ago and used to do pulls? In a way it would be cleaner to have
another unique branch
No you do all your work in the same directory. This took some getting
used to for me, but most of the time it's actually quite neat.
(In particular you can have several branches, which you can see with
git branch, and switch between them with git checkout.)
On 27.03.2012 20:10, Comer Duncan
Exactly. git checkout magically changes the files in the same
directory to be whatever they are for the branch you are checking out.
You might read at least the first part of
http://www-cs-students.stanford.edu/~blynn/gitmagic/ (maybe there are
better tutorials, but this is the one I used, and I
Am 27.03.2012 20:45, schrieb Comer Duncan:
I am now starting to confront getting knowledge of git...
I have a github account, have been using the git master of sympy for
several weeks and do a git pull every once in a while. For the making
and baking of my 'new' functions/methods, can I
I have been working on an ipython notebook or two and have come up with
several methods which might be good to include in matrices. I am writing to
ask for permission to create a pull request for implementation of the new
stuff. Here is a list, more details can be provided as needed:
1.
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