Department of

# Mathematics

Seminar Calendar
for events the day of Wednesday, March 13, 2019.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
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31


Wednesday, March 13, 2019

3:00 pm in 341 Altgeld Hall,Wednesday, March 13, 2019

#### Hyperfiniteness and descriptive combinatorics: ideas and proofs

###### Clinton Conley (Carnegie Mellon)

Abstract: We discuss some ideas and proofs behind the results surveyed in the first part of this talk on Tuesday.

3:00 pm in 243 Altgeld Hall,Wednesday, March 13, 2019

#### To Be Announced

###### Trevor Harris (University of Illinois, Statistics)

3:00 pm in 2 Illini Hall,Wednesday, March 13, 2019

#### What are matrix factorizations?

###### Jesse Huang (Illinois Math)

Abstract: A matrix factorization is, roughly speaking, what looks like AB=fId where f is a polynomial and every square matrix in the equation takes value in the polynomial ring. This notion was originally introduced in the study of homological algebra on (singular) complete intersections and then generalized and made into a younger sibling of the derived category of coherent sheaves. The state-of-the-art consolidates the study of things like hypersurface singularities and (A to B) mirror symmetry for non-CYs. I will try to showcase some basics and survey through a handful of well-known results in this talk.

5:00 pm in 314, 245, 243 Altgeld Hall,Wednesday, March 13, 2019

#### Mid Semester Meeting

Abstract: The IGL Mid-Semester meeting will be taking place next Wednesday evening (03/13) from 5-6:30 pm in Altgeld Hall. Due to the large number of IGL projects, this mid-semester meeting will involve three parallel sessions, with each group presenting in one of the following three rooms as indicated below. Furthermore, the presentations will allowed to be a bit longer: this semester each groups presentation will last up to 7 minutes, plus a minute for questions to occur. We expect each group to last roughly 10 minutes.

AH 314:
Natural Selection and the Bystander Effect
Modeling Prevalence of Juul and other E-Cigarette
Use Evaluating models of social group competition
Do Blue Skies drive away Pollution?
The Smart Foodie
San Francisco Parking
Movement Disorder Gait Data
Uber Air Taxis
Virtual Reality and Movement Disorders

AH 245:
Pairs of Disjoint Matchings
Homological Algebra of Quiver Representations
Automata and Numeration Systems
Developing Exciting Outreach Material Decomposition
Theorems for Spectra