#11754: Computation of rank-decompositions in Sage
-----------------------------+----------------------------------------------
Reporter: ncohen | Owner: jason, ncohen, rlm
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.0
Component: graph theory | Keywords:
Work_issues: | Upstream: N/A
Reviewer: David Coudert | Author: Nathann Cohen
Merged: | Dependencies:
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Old description:
> Hello everybody !
>
> This patch is an interface between Sage and the software RW, written by
> Philipp Klaus Krause [1]. It is written in C, and freshly licensed under
> the GPL2. It is a highly enumerative code that uses a lot of memory, but
> is still so far the best practical way to obtain optimal decompositions.
>
> This patch creates the module sage.graphs.graph_decompositions and the
> rankwidth-related files. As it requires some documentation, some words
> are added on what a rank-decomposition is and where the code is coming
> from. Doing that, I also added sage.graphs.modular_decompositions to the
> documentation.
>
> (As I created a module graph_decompositions, it would make sense to move
> te modular_decomposition there. It thought it best to do it in a distinct
> patch, this one being large enough already)
>
> Oh. By the way, most of the patch actually contains the copy of the files
> written by Philipp Klaus Krause.
>
> Nathann
>
> http://pholia.tdi.informatik.uni-frankfurt.de/~philipp/software/rw.shtml
>
> APPLY:
> * [attachment:trac_11754.patch]
> * [attachment:trac_11754_warning.patch]
New description:
Hello everybody !
This patch is an interface between Sage and the software RW, written by
Philipp Klaus Krause [1]. It is written in C, and freshly licensed under
the GPL2. It is a highly enumerative code that uses a lot of memory, but
is still so far the best practical way to obtain optimal decompositions.
This patch creates the module sage.graphs.graph_decompositions and the
rankwidth-related files. As it requires some documentation, some words are
added on what a rank-decomposition is and where the code is coming from.
Doing that, I also added sage.graphs.modular_decompositions to the
documentation.
(As I created a module graph_decompositions, it would make sense to move
te modular_decomposition there. It thought it best to do it in a distinct
patch, this one being large enough already)
Oh. By the way, most of the patch actually contains the copy of the files
written by Philipp Klaus Krause.
Nathann
http://pholia.tdi.informatik.uni-frankfurt.de/~philipp/software/rw.shtml
APPLY:
* [attachment:trac_11754.patch]
* [attachment:trac_11754_warning.patch]
* [attachment:trac_11754-ifndef.patch]
--
Comment(by ncohen):
Ok, in the end it's not really fair that Philipp should change his code to
make ours work. I just added this "ifndef" preprocessor instruction in the
rw.h file, and I guess it will not be the end of the world to remember if
we have to update the code at some point (which I'd probably do myself
anyway `:-p`).
Please tell me if it works on your computer, and let's roll `:-)`
Nathann
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11754#comment:38>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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