Events for 09/28/2016 from all calendars

Number Theory Seminar

Time: 1:45PM - 2:45PM

Location: BLOC 220

Speaker: Andrew Bridy, Texas A&M University

Title: Ramification and Galois Theory of Preimage Fields

Abstract: Let K be a number field or a function field of characteristic 0, and let f in K(x) and b in K. In the tower of field extensions given by K_n := K(f^{-n}(b)), I show that the conclusion of Zsigmondy's theorem holds for ramified primes (for number fields, the proof is conditional on the abc conjecture). This has applications to the Galois theory of these extensions. In some cases, it can be used to prove a dynamical analogue of Serre's open image theorem: the projective limit of the groups Gal(K_n/K) has finite index in the automorphism group of an infinite rooted tree.

URL: Event link

Noncommutative Geometry Seminar

Time: 2:00PM - 2:50PM

Location: BLOC 628

Speaker: Guoliang Yu, Texas A&M University

Title: K-theory of group Banach-*-algebras and actions on l^p-spaces

Abstract: I will give an overview of my joint work with Gennadi Kasparov on K-theory of group Banach-*-algebras and its connection to group actions on l^p-spaces. I will also advertise several open questions.

First Year Graduate Student Seminar

Time: 5:30PM - 6:30PM

Location: BLOC 628

Speaker: Student panel

Title: Panel discussion: Adjusting to graduate school.