Until yesterday the recommended way to use the Dummy class was with Symbol('x',
dummy=True). While I agree that the new syntax is better, we should take a
more cautious approach in removing the old syntax. According to git blame, it
has been described in the user guide since 2008 and Dummy
While using the code printing framework I have discovered a couple of
nuisances, and I've collected fixes in this branch. Most patches are small and
contain rather trivial changes.
https://github.com/sympy/sympy/pull/116
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The above code is also available at
http://github.com/jegerjensen/sympy/tree/fortran_codegen
(all patches) and http://github.com/jegerjensen/sympy/tree/fortran_free_form2
(For just the 3 first patches)
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Sorry, I didn't know about the tests under doc/. I fixed it in the
second patch, and created new branches at github:
http://github.com/jegerjensen/sympy/tree/fortran_codegen2 and
http://github.com/jegerjensen/sympy/tree/fortran_free_form3 .
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ronan.l...@gmail.com wrote:
Le vendredi 30 avril 2010 à 14:23 -0700, Ondrej Certik a écrit :
On Fri, Apr 30, 2010 at 6:26 AM, jegerjensen jensen.oyv...@gmail.com
wrote:
Also, shouldn't this go into sympy.core?
Ondrej
That is probably a good idea. Where should we put the decorator
On 1 Mai, 15:22, Øyvind Jensen jensen.oyv...@gmail.com wrote:
SymTuple did not fulfill foo.func(*foo.args) == foo. This patch fixes that
by treating the constructor *args as items of the tuple, rather than expecting
exactly one tuple argument.
Added docstring, doctest and test + fixed some
Thanks for your comments. I created another patch, which by accident
ended up in a new thread. Lets continue this discussion there.
Øyvind
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The above patch was my response to Ondrejs comment:
Well,
I am not sure that the change from:
-assert st == SymTuple((1,2,3,4))
to:
+assert st == SymTuple(1, 2, 3, 4)
is a good idea. In fact I think it's a bad idea, as we migrated from
Matrix(1,2, 3, 4) syntax to Matrix([1, 2, 3, 4]).
All right, lets drop it, no big deal.
Øyvind
On 5 apr, 19:25, Ondrej Certik ond...@certik.cz wrote:
On Sun, Apr 4, 2010 at 11:34 PM, Øyvind Jensen jensen.oyv...@gmail.com
wrote:
Well, I think it can be useful, especially since the commutative
property is lost if you do
s =
On 31 Mar, 22:45, Aaron S. Meurer asmeu...@gmail.com wrote:
On Mar 31, 2010, at 2:38 PM, Vinzent Steinberg wrote:
2010/3/31 jegerjensen jensen.oyv...@gmail.com:
On 31 Mar, 21:50, Vinzent Steinberg vinzent.steinb...@googlemail.com
wrote:
I'm not sure whether as_dummy() is really
I also put these patches on github/fix_dummy
cheers!
Øyvind
On 31 Mar, 12:56, Øyvind Jensen jensen.oyv...@gmail.com wrote:
In situations where it is natural to generate dummy symbols with
Symbol.as_dummy(), the reverse process may also be useful.
Uncommented two tests for this.
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On 31 Mar, 21:50, Vinzent Steinberg vinzent.steinb...@googlemail.com
wrote:
I'm not sure whether as_dummy() is really useful.
I think of it as akin to the way you would use prime in hand writing,
like using x' as an integration variable for a function of x.
Shouldn't just passing the
Ooops! it turns out I actually got a failing doctest in
secondquant.py... Sorry about that.
This was because of a comparison ab that should have used cmp(), and
the fix is obvious.
Two patches are now uploaded on github in the branch fix__lt__
http://github.com/jegerjensen/sympy/tree/fix__lt__
the different
behaviour of our installations, but I have a very short python path:
PYTHONPATH=.
Øyvind
Aaron Meurer
On Feb 27, 2010, at 1:33 PM, jegerjensen wrote:
It is the same. What do you get from grep? I don't see any raise of
that exception...
[...@ubuntulaptop sympy (fix_wicks2)]$ grep
) + KroneckerDelta(_i,
_r)*KroneckerDelta(_p, _r)
= tests finished: 341 passed, 1 failed in 6.34 seconds
=
So this has to be fixed. Rebased patches are in my wick3 branch at
github.
Let's get these patches in.
Ondrej
On Sun, Oct 18, 2009 at 2:09 PM, jegerjensen
:58 AM, jegerjensen
jensen.oyv...@gmail.com wrote:
I implemented lots of doctests, and pushed to my new github
account:
git://github.com/jegerjensen/sympy.git
There is still some doctests missing, but I think all the
important
And another push... I overlooked the substitution Wicks - wicks.
Øyvind
On 18 Okt, 22:51, jegerjensen jensen.oyv...@gmail.com wrote:
I just pushed some of the trivial fixes to github, please pull.
Ondrej, I fixed the 'str' variable as well.
Øyvind
On 15 Okt, 18:54, Brian Granger
I implemented lots of doctests, and pushed to my new github account:
git://github.com/jegerjensen/sympy.git
There is still some doctests missing, but I think all the important
stuff is covered.
Øyvind
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Ooops! I have to correct myself:
The reason I chose the sparse format for the Fermionic case was not
because of storage considerations. Rather because I wanted to treat
problems without depending on the number of particles and the size of
the model space. I believe the framework will be
For what is worth, I also wrote a wick expansion in sympy, see my
wick branch at github:
http://github.com/certik/sympy/tree/wick
if you run the t.py script in the root directory, it will save all
the feynman diagrams to /tmp as png images. It only works for scalar
bosons.
Your wicks
Thanks, it sure is great to see your enthusiasm :-)
It turned out I have made two small changes elsewhere in the code, so
I made a total of 4 patches, and I will try to send them in now.
About using the Coupled Cluster example as a unit test: On my laptop
(from 2005) it takes about 2-3
Hi all,
I have implemented a framework for working with fermionic second
quantization operators with Sympy and I'd like to submit patches for
incorporation in the project.
I have tried to reuse the existing Bosonic framework when applicable,
and have ended up with code that reproduces a lot of
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