[Binghamton Geometry Topology Seminar] Fwd: Algebra Seminar - Feb. 8, 2022 at 2:50 PM in WH-100E

[Daniel Studenmund]

My Algebra Seminar talk this Tuesday might be of interest to some of you:

---------- Forwarded message ---------
From: Alex Feingold <alex at math.binghamton.edu>
Date: Sun, Feb 6, 2022 at 9:46 AM
Subject: Algebra Seminar - Feb. 8, 2022 at 2:50 PM in WH-100E
To: Algebra Seminar <algsem at math.binghamton.edu>







*If we have a normal semester, the seminar will meet in-person on Tuesdays
in room WH-100E at 2:50 p.m. There should be refreshments served at 4:00 in
room WH-102. If COVID causes us to change the plan, we would go back to
having only zoom talks. Currently we are required to use masks for all
indoor campus events, so all speakers and attendees must wear masks in the
Algebra Seminar. *

   - *February 8*
   Daniel Studenmund (Binghamton University)
   *The profinite topology and related constructions*

   *Abstract*: This talk will give an intro to, and examples of, the
   profinite topology on an abstract group. After reviewing the example of the
   p-adic topologies on the integers and rationals, we will define the
   profinite topology and give Furstenberg's proof of the infinitude of
   primes. We will use this to define the abstract commensurator of a group
   and provide some examples. Examples will connect with the theory of
   profinite groups, Galois groups, and non-Archimedean local fields.


-- 
______________________________________________________
Professor Alex J. Feingold
Department of Mathematical Sciences
State University of New York
Binghamton, New York 13902-6000
Fax: 607-777-2450 (To Math Department)
Email: alex at math.binghamton.edu
Webpages: http://people.math.binghamton.edu/alex/
______________________________________________________

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