Events for 04/02/2019 from all calendars
Student/Postdoc Working Geometry Seminar
Time: 1:00PM - 2:00PM
Location: BLOC 628
Speaker: A. Conner, TAMU
Title: Implementing border multi-graded apolarity
Seminar on Banach and Metric Space Geometry
Time: 3:00PM - 4:00PM
Location: BLOC 220
Speaker: Gilles Lancien, Universite de Bourgogne Franche-Comte
Title: Concentration phenomenon vs non coarse embeddability
Abstract: We will discuss the coarse embeddability of the Hamming graphs and of Kalton's interlaced graphs into Banach spaces. Concentration inequalities for Lipschitz maps defined on these graphs have proven to be very important coarse invariants for Banach spaces. We will explain in each case, why they are different from the "non equi-coarse embeddability" of the corresponding family of graphs. These remarks are taken from joint works with C. Petitjean and A. Prochazka and with F. Baudier, P. Motakis and Th. Schlumprecht.
Douglas Lectures
Time: 4:00PM - 5:00PM
Location: Blocker 117
Speaker: Vaughan Jones, Vanderbilt University
Title: An introduction to subfactors
Abstract: Von Neumann algebras are closed *-algebras of operators on Hilbert space. A factor is a von Neumann algebra whose center is just the scalar multiples of the identity. Murray and von Neumann discovered novel factors in the 1930’s. Among which are the II_1 factors whose Hilbert spaces admit a dimension function. Thus a subfactor N in M has an index [M:N] given by the dimension of M as a Hilbert space over N. A finer invariant is the principal graph of a subfactor, a graph whose norm is the square root of the index. I will list all subfactors of index less than 4 together with their indices and principal graphs.