Past Seminars

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  • tba
    Milivoje Lukic
    Thu Feb 22, 2018
    2:00 pm
  • Tue Feb 20, 2018
    3:00 pm
    Speaker #1: Renato Bettiol (University of Pennsylvania)  Title:  A Weitzenbock viewpoint on sectional curvature and application Abstract:  In this talk, I will describe a new algebraic characterization of sectional curvature bounds that only involves curvature terms in the Weitzenboeck formulae for symmetric tensors. This...
  • Gene Kim
    Tue Feb 20, 2018
    11:00 am
    The distribution of descents in certain conjugacy classes of S_n have been previously studied, and it is shown that its moments have interesting properties. This paper provides a bijective proof of the symmetry of the descents and major indices of matchings (also known as fixed point free involutions) and uses a generating function approach...
  • Conference website:
    Sun Feb 18, 2018 - Mon Feb 19, 2018
    9:00 am
  • Song-Ying Li
    Fri Feb 16, 2018
    4:00 pm
    In this talk, I will give you many ways to characterize  the unit ball in $R^n$ or in $C^n$. It involves, differential equations, first eigenvalue of Laplace-Beltrami  operator, etc.  
  • Zhaosong Lu
    Fri Feb 16, 2018
    11:00 am
    In the first part of this talk, we study a convex-constrained nonsmooth DC program in which the concave summand of the objective is an infimum of possibly infinitely many smooth concave functions. We propose some algorithms by using nonmonotone linear search and extrapolation techniques for possible acceleration for this problem, and analyze their...
  • Barry Simon
    Thu Feb 15, 2018
    4:00 pm
    This is not a mathematics talk but it is a talk for mathematicians. Too often, we think of historical mathematicians as only names assigned to theorems. With vignettes and anecdotes, I'll convince you they were also human beings and that, as the Chinese say, "May you live in interesting times" really is a curse. More tales following...