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Texas A&M University
Mathematics

Events for 02/26/2018 from all calendars

Probability Seminar

iCal  iCal

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

iCal  iCal

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

iCal  iCal

Time: 3:00PM - 3:50PM

Location: BLOC 506A

Speaker: Jintao Deng, Texas A&M University

Title: Groupoid II


Student/Postdoc Working Geometry Seminar

iCal  iCal

Time: 5:00PM - 6:00PM

Location: BLOC 628

Speaker: JM Landsberg, TAMU

Title: Strassen II