Events for 02/26/2018 from all calendars
Probability Seminar
Time: 2:00PM - 3:00PM
Location: BLOC 220
Speaker: Erik Lundberg, Florida Atlantic University
Title: Random matrices arising in the study of random fields
Abstract: Certain problems in random fields, such as studying the solutions to a random system of equations (e.g., the critical points of a random potential energy landscape) have made important use of random matrix theory. After surveying some applications related to classical random matrix ensembles, we present a new direction in random fields concerning the solutions to problems in enumerative geometry (e.g., the number of lines on a random cubic surface). The resulting random matrices are of a special structured type. We conclude with some open problems that are simple to state. This is joint work with Saugata Basu, Antonio Lerario, and Chris Peterson.
Geometry Seminar
Time: 3:00PM - 4:00PM
Location: BLOC 628
Speaker: Ron Rosenthal, Technion
Title: Random Steiner complexes
Abstract: We will discuss a new model for random d-dimensional simplicial complexes, for d ≥ 2, whose (d − 1)-cells have bounded degrees. The construction relies on Keevash's results on the existence of Steiner systems which are generalizations of regular graphs. We will show that with high probability, complexes sampled according to this model are high-dimensional expanders. This gives a full solution to a question raised by Dotterrer and Kahle, which was solved in the two-dimensional case by Lubotzky and Meshulam. In addition, we will discuss the limits of their spectral measures and their relation to the spectral measure of certain high-dimensional regular trees. Based on a joint work with Alex Lubotzky and Zur Luria and a work in progress with Yuval Peled.
Working Seminar in Groups, Dynamics, and Operator Algebras
Time: 3:00PM - 3:50PM
Location: BLOC 506A
Speaker: Jintao Deng, Texas A&M University
Title: Groupoid II
Student/Postdoc Working Geometry Seminar
Time: 5:00PM - 6:00PM
Location: BLOC 628
Speaker: JM Landsberg, TAMU
Title: Strassen II