Department of

# Mathematics

Seminar Calendar
for Logic Seminar events the year of Friday, February 14, 2020.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
     January 2020          February 2020            March 2020
Su Mo Tu We Th Fr Sa   Su Mo Tu We Th Fr Sa   Su Mo Tu We Th Fr Sa
1  2  3  4                      1    1  2  3  4  5  6  7
5  6  7  8  9 10 11    2  3  4  5  6  7  8    8  9 10 11 12 13 14
12 13 14 15 16 17 18    9 10 11 12 13 14 15   15 16 17 18 19 20 21
19 20 21 22 23 24 25   16 17 18 19 20 21 22   22 23 24 25 26 27 28
26 27 28 29 30 31      23 24 25 26 27 28 29   29 30 31



Tuesday, January 21, 2020

1:00 pm in 241 Altgeld Hall,Tuesday, January 21, 2020

#### Organizational meeting

Abstract: Just a short organizational meeting for Logic seminar and the MT/DST Seminar.

Tuesday, February 11, 2020

1:00 pm in 241 Altgeld Hall,Tuesday, February 11, 2020

#### The Borel complexity of quotient groups

###### Joshua Frisch (Caltech Math)

Abstract: The theory of Borel equivalence relations gives us rigorous methods to says when one classification problem/equivalence relation is more "complicated" than another. Given a countable group it's outer-automorphism group naturally has the structure of a borel equivalence relation. Motivated by this example, in this talk I will give a brief introduction to the theory of countable borel equivalence relations, describe some previously known connections with the theory of groups and, finally, describe a new new result explaining exactly how complicated the Borel complexity of quotient groups (which generalize outer-automorphism groups) can be. This is joint work with Forte Shinko.

Tuesday, March 24, 2020

1:00 pm in 241 Altgeld Hall,Tuesday, March 24, 2020

#### To Be Announced

###### Filippo Calderoni (UIC Math)

Friday, March 27, 2020

4:00 pm in ??? Altgeld Hall,Friday, March 27, 2020
###### Aristotelis Panagiotopoulos (Caltech Math)

Friday, April 17, 2020

4:00 pm in ??? Altgeld Hall,Friday, April 17, 2020

#### To Be Announced

###### Meng-Che (Turbo) Ho (Purdue University)

Tuesday, April 21, 2020

1:00 pm in 241 Altgeld Hall,Tuesday, April 21, 2020