*-Combinat 2009

International Sage Workshop on Free and Practical Software for Algebraic Combinatorics

Dates: July 25-29

Location: RISC, Linz, Austria

This event will follow FPSAC'09, and be part of RISC's summer 2009.

Goals

• get new users and developers on board, especially from the FPSAC community
• help former MuPAD-Combinat users to switch to Sage
• developers meeting

Tentative program

• Saturday:
  • Sage and Sage-Combinat introductory talks
  • Hands on tutorials
• Sunday:
  • Informal Sage-Combinat lab: come work on your own problem with experts at your full disposition
  • Relaxed afternoon (to recover from a long FPSAC week)
• Monday-Wednesday:
  • Informal Sage-Combinat lab
  • Technical talks
  • Short focused tutorials (see below)
  • Coding sprints
  • Design discussions

Projects

• Project page

Organizers

• NicolasThiéry

• Burcin Erocal - [email protected]

• Ralf Hemmecke - [email protected]

• Michael Abshoff

Registration

Registration is free, but please register on: http://www.conferences.jku.at/riscsummer2009/e2570/index_eng.html.

Very convenient and reasonably priced rooms are available for reservation from the same site, but may run out. Register early!

Prerequisites

All attendees are expected to have Sage >= 4.1 and the Sage-Combinat patches installed on their laptops. If you do not plan to bring a laptop, please contact the organizers, and we will have a terminal setup for you. Please come see us for help during FPSAC if you encounter any problem!

Sage 4.1 will be available shortly from: http://www.sagemath.org/download.html

See http://wiki.sagemath.org/combinat/MercurialStepByStep for the installation instructions of Sage-Combinat. On UNIX/Mac, it boils down to running the following command in a terminal:

sage -combinat install

T-Shirts

If you would like to get the T-Shirt for this workshop (~$10), please write the size below before July 11th. Here is the current design (suggestions welcome): front-nt.png back-nt-2.png

And if you wonder about the meaning: Sage is the powerful propeller allowing us to soar high to our Castle in the Sky. Our hope is that in return our scouting will help drive the car to new horizons.

Registered Participants

• Jason Bandlow

• NicolasBorie (T-Shirt size L)

• Adrien Boussicault
• Mahir Bilen Can
• Hayat Cheballah
• Anders Claesson

• DanDrake (T-shirt size M)

• Burcin Erocal (T-Shirt sizes M + S)
• Valentin Féray
• Christoph Fuerst
• Ralf Hemmecke

• FlorentHivert

• Alain Lascoux
• Conrado Martinez

• Peter McNamara (leaving Monday afternoon)

• Philippe Nadeau
• Yasuhide NUMATA
• Steven Pon

• FrancoSaliola (leaving 28 July)

• Anne Schilling (T-Shirt size S)
• Flavia Stan
• Jessica Striker
• Hossein Teimoori

• NicolasThiéry (T-Shirt size M)

• Haseeb Ul Haq
• Zafeirakis Zafeirakopoulos

Unconfirmed participants

• Michael Abshoff

• HaraldSchilly

• Paul-Olivier Dehaye

• MikeHansen?

• DavidJoyner?

• RobertMiller?

Preliminary list of short tutorials

Besides the main general-purpose Sage-Combinat tutorial, we will run short tutorials focused on specific features, with a (flexible) format like 10 minutes of presentation; 20 minutes of exercises. Here are some ideas. Please feel free to suggest others, especially around some features you developed yourself!

• Posets (Franco?)
• Words (Franco?)
• Species and decomposable classes in Axiom / Aldor / Maple / MuPAD (Mike? Ralf? Martin?)
• guess in Axiom / Aldor (Martin?)
• Coxeter groups, crystals (Anne, Nicolas)
• Symmetric Functions, Non Commutative Symmetric Functions, using algebras with several basis (Jason? Nicolas?)
• categories/parents/elements (Nicolas)
• Implementing enriched enumerated sets, (e.g. how to enrich the partitions of 5 with a semi-groups structure) (Florent?)
• Implementing new combinatorial objects (?)
• Implementing new (Hopf) Algebras with bases (Florent? Nicolas?)
• Sharing code with the Sage-combinat patch server

• using the GenericBacktracker class to generate lattice paths and other objects (Dan Drake)?