Sage-Combinat: enhancing Sage as a toolbox for computer exploration in algebraic combinatorics
Sage-Combinat is a software project whose mission is: to improve the open source mathematical system Sage as an extensible toolbox for computer exploration in (algebraic) combinatorics, and foster code sharing between researchers in this area.
In practice, Sage-combinat is a collection of branches on top of Sage, developed by a community of researchers. The intent is that most of those branches get eventually integrated into Sage as soon as they are mature enough, with a typical short life-cycle of a few weeks. In other words: just install Sage, and you will benefit from all the Sage-combinat development, except for the latest bleeding edge features.
Experimental Sage notebook with the Sage-Combinat patches applied
A new poster for Sage-Combinat!
June 8-12, 2015 Sage Days 65, Loyola University Chicago, USA
- Organized by Mark V. Albert, Aaron Lauve, Peter Tingley
April 13-16, 2015 Sage Days 67, UQAM, Canada
- Organized by Mathieu Guay-Paquet, Viviane Pons, Franco Saliola
March 17-20, 2015 Sage Days 64, University of California at Davis, USA
- Organized by Dan Bump, Anne Schilling and Travis Scrimshaw
August 14-17, 2014 Sage Days 60, Chennai, India
April 7-11, 2014 Sage(-Combinat) Days 57, Cernay, France
November 4-8, 2013 Sage(-Combinat) Days 54, University of California at Davis, USA
- Organized by Dan Bump, Anne Schilling and Travis Scrimshaw
June 17-21, 2013 Sage(-Combinat) days 49, in Orsay as satellite event to FPSAC'13
- Organized by Alejandro Morales, Anne Schilling, Nicolas M. Thiery
January 28 - May 3, 2013: ICERM Semester Program on "Automorphic Forms, Combinatorial Representation Theory and Multiple Dirichlet Series", with a strong Sage and Sage-Combinat component, ICERM, Brown, USA
February 11-15, 2013 Sage Days: Multiple Dirichlet Series, Combinatorics, and Representation Theory, ICERM, Brown, USA
- Organized by Franco Saliola, Anne Schilling, Nicolas M. Thiery
January 21-25, 2013 Online Databases:from L-functions to combinatorics, Edinburgh
Organized by Paul-Olivier DeHaye, Nicolas M. Thiery.
October 29 - November 9, 2012: CIMPA summer school Discrete mathematics : combinatorial, dynamical and algorithmic aspects, with a strong Sage and Sage-Combinat component, Bobo Dioulasso, Burkina Faso
July 9-13 2012: Sage(-Combinat) Days 40: Algebraic Combinatorics, IMA, Minneapolis, USA
- Organized by Gregg Musiker, Franco Saliola, Anne Schilling, Nicolas M. Thiery.
May 7-11 2012: Sage(-Combinat) Days 38: algebraic combinatorics and the representation theory of algebras, Centre de recherches mathématiques, Montréal, Canada
April 18-th 2012: Coxeter/Cluster algebra afternoon at the Paris Sage User Group meeting
February 8-10 2012: Sage and cluster algebra workshop, University of Hannover
February 6-10 2012: Sage-Combinat Days Cernay 2012
March 19-23 2012: EJC du GDR-im a Rennes site officiel
May 2-6, 2011: Sage Days 30: Combinatorics (Schubert calculus, cluster algebras) and Number theory (integer vectors, multidimensional digit representations) in Acadia University, Wolfville, Nova Scotia, Canada
- Organized by Eva Curry and Hugh Thomas.
January 17-19, 2011: Sage days 28: dynamics, geometry, and analytic combinatorics in Orsay
July 10, 2010: First release of Calcul Mathématique avec Sage
- A 315 pages open source french introductory book on computational mathematics, illustrated in Sage, and including a 35 pages chapter on combinatorics (and soon one on graph theory).
July 7-15, 2010: Affine Schubert Calculus workshop and summer school in Toronto
- It includes several Sage and Sage-Combinat sessions. Organized by Anne Schilling and Mike Zabrocki.
June 14-18, 2010: Joint Sage-Combinat and Chevie Workshop in Orsay
May 3-7, 2010: Sage Days 20.5 in Toronto
Organized by Nantel Bergeron, FrancoSaliola and Mike Zabrocki, again with a serious algebraic combinatorics slant
February 22-26, 2010: Sage days 20
The thematic month MathInfo 2010 at CIRM, Marseille included a Sage days week. FlorentHivert, NicolasThiéry, and FrancoSaliola were among the organizers and there was a serious combinatorics slant.
July 25-29, 2009: *-Combinat 2009
We held an International Sage Workshop on Free and Practical Software for Algebraic Combinatorics at RISC, Linz, Austria, right after FPSAC'09
May 25th, 2009: The Sage-words library demonstrated at the 2nd Canadian Discrete and Algorithmic Mathematics Conference CanaDAM'09 Sage worksheet, PDF.
April 15th, 2009: Software demonstration accepted for FPSAC'09 PDF, LaTeX Source LaTeX bibliography
January 26-30, 2009: Sage-Combinat Workshop in Orsay
- 2008-06-19: MuPAD-Combinat join forces with Sage
Sage-combinat was born as a partial port of MuPAD-Combinat. After months of discussions and experiments, an enthusiastic consensus emerged in the MuPAD-Combinat community to join Sage. Sage-combinat henceforth became the natural successor of MuPAD-Combinat.
- The transition was a massive investment (and is not yet completely over): seven years of hard work to port over! However a lot of experience was gained since 2000, and most of the design was pretty clear, and we could *share* the work.
Who are we? What is Sage-Combinat used for?
Cite Sage-Combinat when you use it for research publications.
Cool pictures we produced with Sage-Combinat for our research
How to participate and contribute
- Join our mailing lists:
- Announcement mailing list (to come)
sage-combinat-devel: Developers' mailing list
sage-combinat-commits: A low traffic mailing list which receives an automatic notice whenever a sage-combinat related ticket is modified (and eventually whenever a commit is done on the patch server).
sage-combinat-days: Mailing list for the organisation of Sage-Combinat days
Check the road map and current status
Post bug reports, suggestions, patches on the Sage-Combinat trac server or on the mailing list.
Since Sage 6.0, the development workflow has been reworked in depth, and we are in the progress of migrating the extensions as git branches. Here are some useful links:
The Sage-Combinat extensions used to be managed as a collection of patches on our patch server, using a so-called mercurial queue. Quite some stuff below is thus outdated, and will be progressively replaced by information on the new workflow.
Browse the Sage sources with the Sage-combinat patches applied (only useful for Sage version prior to sage-6.0)
Developing for Sage-Combinat on Windows: Sage Development on Windows.
Have a look and participate to design discussions.
Contribute to the list of quirks and weirdness issues in the *-Combinat design.
The Combinatorial Software and Databases web page maintained by Christian Krattenthaler