• 2018-02-20

    Stéphanie Schanck, Véronique Bazier-Matte, Nadia Lafrenière, Mélodie Lapointe, Pauline Hubert et Élise Vandomme participant au film « Faces of Women in Mathematics »

  • slide02

    Pavillon Président-Kennedy, UQAM

  • slide05

    ARTA III : Avancées en théorie des représentations des algèbres (2014)

  • slide04

    Mathématiques à Marseille avec Mark Haiman, Cédrik et François Bergeron

  • RS, Adriano Garsia
La Jolla, CA

[#Beginning of Shooting Data Section]
Nikon CoolPix2500
2003/01/26 20:34:50
JPEG (8-bit) Basic
Image Size:  1600 x 1200
Color
ConverterLens: None
Focal Length: 5.6mm
Exposure Mode: Programmed Auto
Metering Mode: Multi-Pattern
1/152.7 sec - f/4.5
Exposure Comp.: 0 EV
Sensitivity: Auto
White Balance: Auto
AF Mode: AF-S
Tone Comp: Auto
Flash Sync Mode: Front Curtain
Electric Zoom Ratio: 1.00
Saturation comp: 0
Sharpening: Auto
Noise Reduction: OFF
[#End of Shooting Data Section]

    Maths à la plage, Richard Stanley et Adriano Garsia (2003)

  • slide06

    Mathématiques au bar à Banff avec Adriano Garsia et Nantel Bergeron

  • slide07

    Mathématiques à la montagne avec Francois et Nantel Bergeron, Jennifer Morse et Adriano Garsia

  • slide10

    Christophe Reutenauer et Toni Machi, Bibbiena 2008

  • slide09

    Xavier Viennot, Nantel Bergeron, Christophe Reutenauer, près de Alghero 1988

  • slide08

    Les membres du LACIM au début des années 90

  • slide11

    Denis Thérien, Marcel-Paul Schützenberger, Oberwolfach 1986

  • slide12

    Soutenance de thèse de Jérôme Fortier

  • slide13

    Gilbert Labelle, Christophe Reutenauer, chez Pierre Leroux, Longueuil, début des années 2000

  • slide16

    Christian Stump, Nicolas Thiéry, Franco Saliola, Florent Hivert

  • slide15

    Richard Stanley au séminaire du LACIM

  • slide14

    Journées Sage au LACIM

  • slide18

    Colloque sur les groupes de Coxeter

  • slide22

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

  • slide27

    Journées Sage

  • slide26

    Séminaire du LACIM

  • slide29

    La choucroute du patron

  • slide28

    La choucroute du patron

Séminaires

The Shapiro-Shapiro ConjectureFriday, 14 December 2018, 13:30

Kevin Purbhoo (Waterloo)

Abstract: In the 1880's, Schubert solved a problem about enumerating subspaces of $\mathbb{C}^n$ that have non-trivial intersections with other subspaces, beginning the study of what is now known as Schubert calculus. Nowadays, Schubert's problem is usually reinterpreted as a calculation in the cohomology ring of the Grassmannian, and this perspective has been vastly generalized. However, if we change $\mathbb{C}^n$ to $\mathbb{R}^n$, the cohomology perspective no longer works and the situation is less well understood. In 1993, Boris and Michael Shapiro formulated a remarkable conjecture about real solutions to Schubert problems. It was proved in 2005 by Mukhin, Tarasov and Varchenko, using high powered machinery from quantum integrable systems. Since then, many applications and generalizations have been found or conjectured. In this talk, I will tell the story of the Shapiro-Shapiro conjecture, and then tell you about a new theorem (joint work with Jake Levinson), a not-so-obvious generalization. Our result is independent of Mukhin-Tarasov-Varchenko, implies the conjecture, and naturally lends itself to a much more intuitive proof.

TBAFriday, 25 January 2019, 13:30

Mélodie Lapointe (UQAM)

Abstract: TBA