2017 - 2018
Calendrier / Calendar
Date Heure/Time : Le vendredi 13 octobre 2017 - 16:00
Lieu/Venue : UdeM, Pavillon André-Aisenstadt, salle 6254
Conférencier/Speaker : Avi Soffer, Rutgers University
Titre/Title : Supercritical Wave Equations
I will review the problem of Global existence for dispersive equations, in particular, supercritical equations. These equations who play a fundamental role in science, have been , and remain a major challenge in the field of Partial Differential Equations. They come in various forms, derived from Geometry, General Relativity, Fluid Dynamics, Field Theory. I present a new approach to classify the asymptotic behavior of wave equations, supercritical and others, and construct global solutions with large initial data. I will then describe current extensions to Nonlinear Schroedinger Equations.
Date Heure/Time : Le vendredi 29 septembre 2017 - 16:00
Lieu/Venue : UdeM, Pavillon André-Aisenstadt, salle 1140
Conférencier/Speaker : John H. Conway, Princeton University
Titre/Title : The first field
The “first field” is obtained by making the entries in its addition and multiplication tables be the smallest possibilities. It is really an interesting field that contains the integers, but with new addition and multiplication tables. For example, 2 x 2 = 3, 5 x 7 = 13, ... It extends to the infinite ordinals and the first infinite ordinal is the cube root of 2!
Date Heure/Time : Le vendredi 15 septembre 2017 - 16:00
Lieu/Venue : UQAM, Pavillon Président-Kennedy, 201, ave du Président-Kennedy, salle PK-5115
Conférencier/Speaker : Siyuan Lu, Rutgers University, Lauréat 2017 du Prix Carl Herz / 2017 Carl Herz Prize Winner
Titre/Title : Isometric embedding and quasi-local type inequality
In this talk, we will first review the classic Weyl's embedding problem and its application in quasi-local mass. We will then discuss some recent progress on Weyl's embedding problem in general Riemannian manifold. Assuming isometric embedding into Schwarzschild manifold, we will further establish a quasi-local type inequality. This talk is based on works joint with Pengfei Guan and Pengzi Miao.