Sage Days 49: Free and Practical Software for (Algebraic) Combinatorics, June 17th-21st, Orsay


What's New:

  • Final demos Friday June 21 at 3pm.
  • Reintroduction to Sage Thursday June 20, by Travis Scrimshaw, Petit Amphi.
  • photo gallery
  • Check the complete schedule for links to tutorials and slides of talks.
  • Address for Tuesday's get together (8pm): 39 avenue de Tilleuls, Bures-sur-Yvette. A group will leave from the Math building at 7:15pm, from the hotel at 7:30pm.
  • map2 with points of interest (Math department, Hotel, grocery store, restaurants)
  • FindStat demo Tuesday June 18, 2pm.
  • The closest RER station to the hotel: Residhome Bures La Guyonnerie is Bures-sur-Yvette (one station after Orsay-Ville, see map)
  • The complete schedule which contains abstracts (note first talk on Monday is now at 10h).
  • The wiki page to organize projects and coding sprints is ready. Add an entry for your project there or attach your name to a project that you'd like to work on.
  • Information on how to get to Orsay from airports in Paris.

FPSAC 2013 (Formal Power Series and Algebraic Combinatorics) is the main yearly international conference in algebraic combinatorics. It will happen this year in Paris, June 24th-28th. We are organizing a Sage-Combinat Days as a satellite event the week before:

Sage Days 49: Free and Practical Software for (Algebraic) Combinatorics

Orsay (south west suburb of Paris)

June 17th-21st 2013


Tentative Schedule

Below is a timetable for the week; a full detailed schedule is available here.


Welcome, Sage installation


Talk II - T. Roby Tutorial III - contributing to Sage C. Berg Talk IV - M. Mezzarobba Open Presentations
10h00 Introduction to Sage Tom Denton Coffee Break Coffee Break Coffee Break Coffee Break
10h30 Tutorial II - Programming in Python and Sage V. Pons Tutorial IV - coercion and category framework S. King Tutorial IV -coercion and category framework (continued) S. King Open Presentations
10h45 Tutorial I Sage notebook and help system M. Guay-Paquet
11h30 Talk I - M. Zabrocki Talk III - S. King      
12h30 Lunch Lunch Lunch Lunch Lunch
14h00 Round table - discussion A. Schilling FindStat Demo (Chris, Viviane, Travis) Exercises and Coding Sprints Digiteo Seminar G. Gonthier* Exercises and Coding Sprints
15h00 Final Status Reports
15h30 Coffee Break Coffee Break Coffee Break Coffee Break
16h00 Coding Sprints Coding Sprints Coding Sprints Coding Sprints
17h00 Coding Sprints Status Reports Status Reports Reintro. to Sage T. Scrimshaw  
  • Monday morning-Wednesday morning: tutorial for newcomers and talks with a slant toward algebraic combinatorics
  • Afternoons and rest of the week: coding sprints
  • Thusrday 2pm-3pm: by a coincidence, the Digiteo Seminar will take place in our conference room, with a distinguished lecture by Georges Gonthier on computer-checked proofs: Le génie mathématique, du théorème de quatre couleurs à la classification des groupes.

Newcomers are welcome to join later in the week; there won't be specific events organized for them then, but we will be available for questions and discussions while they get through tutorials on their own or work on their personnal projects.

Access and directions

The workshop will be held at the Faculté d'Orsay, in the math department in the Petit Amphi of the Bâtiment 425.

The math department is 45 minutes from Paris downtown by local trains (take the RER B from Charles de Gaulle or downtown Paris in the direction of St-Rémy-les-Chevreuse and get off at Orsay-Ville). For more details see directions (in french). To purchase the train ticket, there are green machines that take credit cards or coins but no bills. The price to Orsay is 13 euros.

The closest RER station to the hotel: Residhome Bures La Guyonnerie is Bures-sur-Yvette (one station after Orsay-Ville) (see map).

Here is a map2 with points of interest (Math department, Hotel, grocery store, restaurants)

The math department is a five minute walk from the hotel (see below).

Depuis Paris, prendre le RER ( ligne B ) en direction de St-Rémy-les-Chevreuse, et descendre à Orsay-Ville. Se diriger vers le bas de la vallée. On peut alors continuer à pied jusqu'à l'entrée principale de l'Université, puis suivre le sentier qui remonte, jusqu'au fléchage indiquant le bâtiment 425 vers la gauche ( voir le plan en cliquant ici ). Il est également possible de prendre le bus 06-07 ( voir le circuit du bus ) jusqu'à l'arrêt "Château", et suivre le fléchage à partir de là.

(From Paris, take the RER (line B) to St-Remy-les-Chevreuse and get off at Orsay-Ville. Proceed down the valley. We can then continue on foot to the main entrance of the University, then follow the path back until signs indicating the 425 building to the left (see map here). It is also possible to take the bus 06-07 (see circuit bus) to stop "Castle", and follow the signs from there.)


The wiki page for the projects and coding springs is available here.


Participation is free. To register, please fill in this poll so that we can plan ahead for rooms, coffee breaks, ... and also to optimize the lodging. Please send us your e-mail address as well so that we can get in touch with you as the workshop gets closer.


We have negociated a reduced price at the nearby Residhome Appart Hotel from Bures-sur-Yvette. The rate is of 66€ per night (56€ 5 nights or more) for a two person studio (double bed or twin bed). There is also a reduced rate of 106€ (90€ for 5 nights or more) for a four person apartment (two double beds; probably not so convenient). Breakfast is not included; see the web site for the amenities.

To reduce the expenses you are strongly encouraged to find a room mate to share a double room with. In particular, for those person that will get funding from us for lodging, we will most likely reimburse on the basis of 33 euros per night in order to support more participants.

To reserve a room, please send them an e-mail at or call +33 1 64 86 36 00. Mention that you come for the "Sage Days 49 conference". If you want to share a twin room, mention it and specify who your room mate will be.

Caveat: there are only a limited number of rooms with twin beds, and they will run out soon. Therefore you are urged to reserve your room as soon as possible.


For participants coming from universities in the United States, there is funding from our Sage-Combinat NSF grant. Please email Anne Schilling (email anne at with your CV and an estimated budget. The deadline for this is March 30, 2013. Later applications will be considered as long as funds are available.

If you were promised NSF funding, then please send the filled out form along with the original receipts to Jessica Goodall at

Jessica Goodall, Department of Mathematics, University of California, One Shields Avenue, Davis, CA 95616 or by e-mail to .

Invited speakers

Tentative list of participants

See the poll.

If you are in the list below, please register above!

  • Vivien Ripoll (UQAM)
  • Mike Hansen (Harvey Mudd)


Why 49?

Because that's 7^2

Why Orsay?

“Be grateful you’re not in the forest in France

Where the average young person just hasn’t a chance

To escape from the perilous pants eating plants

But your pants are safe, you’re a fortunate guy

You ought to be shouting how lucky am I”

-- Dr. Seuss, Did I Ever Tell You How Lucky You Are?

combinat/FPSAC13 (last edited 2013-06-21 09:11:48 by ahmorales)