• 2018-02-20

    Stéphanie Schanck, Véronique Bazier-Matte, Nadia Lafrenière, Mélodie Lapointe, Pauline Hubert and Élise Vandomme participating in the movie “Faces of Women in Mathematics”

  • slide02

    Pavillon President-Kennedy, UQAM

  • slide05

    ARTA III : Advances in representation theory of algebras (2014)

  • slide04

    Mathematics in Marseille with Mark Haiman, Cédrik and François Bergeron

  • RS, Adriano Garsia
La Jolla, CA

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2003/01/26 20:34:50
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[#End of Shooting Data Section]

    Mathematics at the beach, Richard Stanley and Adriano Garsia (2003)

  • slide06

    Mathematics at the bar in Banff with Adriano Garsia and Nantel Bergeron

  • slide07

    Mountain mathematics with Francois and Nantel Bergeron, Jennifer Morse and Adriano Garsia

  • slide10

    Christophe Reutenauer and Toni Machi, Bibbiena 2008

  • slide09

    Xavier Viennot, Nantel Bergeron, Christophe Reutenauer, near Alghero 1988

  • slide08

    Members of the LACIM in the early 90

  • slide11

    Denis Thérien, Marcel-Paul Schützenberger, Oberwolfach 1986

  • slide12

    Thesis defense by Jérôme Fortier

  • slide13

    Gilbert Labelle and Christophe Reutenauer at Pierre Leroux’s house, Longueuil, early 2000

  • slide16

    Christian Stump, Nicolas Thiéry, Franco Saliola, Florent Hivert

  • slide15

    Richard Stanley at the LACIM seminar

  • slide14

    Sage days at LACIM

  • slide18

    Symposium on Coxeter groups

  • slide22

    Sébastien Labbé, Marco Robado, Srecko Brlek, Louis-François Préville-Ratelle, Alejandro Morales, Mathieu Guay-Paquet, Vivien Ripoll

  • slide27

    Sage days

  • slide26

    LaCIM seminar

  • slide29

    La choucroute du patron

  • slide28

    La choucroute du patron


Thing 1 and Thing 2Friday, 16 November 2018, 13:30

Barry Monson (UNB)

The regular polytopes lie among the crown jewels of geometry. But what are they and how do we generalize them on an 'abstract' (= 'combinatorial') level? I will introduce these beautiful things with the help of lots of pictures. But models may well fail us. We can (and usually do) exploit a natural correspondence between * abstract regular n-polytopes, and ** string C-groups of rank n (well-behaved quotients of certain Coxeter groups) We can learn a lot from building a regular polyhedron by attaching its facets together. But what if I give you supplies of two kinds of facet? (Think: regular octahedra and tetrahedra with identical triangular faces) What then can you build and how symmetric an object can you get? I will finish with a look at current work on such 'alternating semiregular polytopes', and certain non-obvious obstructions to their assembly.

à venirFriday, 23 November 2018, 13:30

Nadia Lafrenière (UQAM)

TBAFriday, 30 November 2018, 13:30

Krishanu Roy (The Institute of Mathematical Sciences, India)

Abstract: TBA

à venirFriday, 07 December 2018, 13:30

Christophe Reutenauer (UQAM)

à venirFriday, 14 December 2018, 13:30

Kevin Purbhoo (Waterloo)