[Binghamton Geometry Topology Seminar] Fwd: Algebra Seminar, Tuesday, Feb. 22, 2022, 2:50 PM in WH-100E

[Daniel Studenmund]

For those interested: tomorrow I'm giving a follow-up to my Algebra seminar
talk of 2 weeks ago

---------- Forwarded message ---------
From: Alex Feingold <alex at math.binghamton.edu>
Date: Sun, Feb 20, 2022 at 12:19 PM
Subject: Algebra Seminar, Tuesday, Feb. 22, 2022, 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 22*
   Daniel Studenmund (Binghamton University)
   *The profinite topology and related constructions, part 2*

   *Abstract*: We will briefly review the definition of the profinite
   topology on a group and the definition of the group of germs of
   automorphisms, and give some examples. We then explain how this topological
   language naturally appears in statements of 1) Neukirch and Uchida about
   rigidity in Galois groups of number fields, and 2) Bass–Milnor–Serre, and
   others, about the congruence subgroup property of certain arithmetic
   groups.


-- 
______________________________________________________
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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