Sage-Combinat

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 experimental patches (i.e. extensions) on top of Sage, developed by a community of researchers. The intent is that most of those patches 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.

Installation instructions

NEWS

• Road map and current status

• 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

• 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

• 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

Past news

• 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

• 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

• 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?

• Contributors

• Institutions and sponsors

• Grant applications

• Publications citing Sage-Combinat

How to participate and contribute

Communication

• 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.

• Cite Sage-Combinat when you use it for research publications.

• Plume's review pages on Sage-Combinat: English and French

• Cool pictures we produced with Sage-Combinat for our research

Code

• The collection of patches is managed using a patch server (mercurial queues). Use it to try out the latest experimental features, or contribute your own patches!

• Browse the Sage sources with the Sage-combinat patches applied

• Please read the Step by step tutorial (in particular, how to download Sage-Combinat)

• For the curious: Technical background on the Sage-Combinat patch server (messy).

• For hg/mercurial lovers: Mercurial: The Definite Guide an e-book by Bryan O'Sullivan

Design

• Have a look and participate to design discussions.

• Contribute to the list of quirks and weirdness issues in the *-Combinat design.

Documentation

• Browse the Sage documentation with the Sage-combinat patches applied

  • And in particular the Thematic tutorials

• Mercurial server for miscelleanous files and documents (Usage instructions)

• Some tips and tricks about the documentation system

Links

• The Combinatorial Software and Databases web page maintained by Christian Krattenthaler