Seminar Calendar
for events the day of Thursday, February 2, 2017.

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Questions regarding events or the calendar should be directed to Tori Corkery.
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Thursday, February 2, 2017

Number Theory Seminar
11:00 am   in 241 Altgeld Hall,  Thursday, February 2, 2017
 Del Edit Copy
Submitted by sahlgren.
 Bruce Berndt (Illinois Math)IdentitiesAbstract: As the title suggests, this lecture features mathematical identities. The identities we have chosen (we hope) are interesting, fascinating, surprising, and beautiful! Many of the identities are due to Ramanujan. Topics behind the identities include partitions, continued fractions, sums of squares, theta functions, Bessel functions, $q$-series, other infinite series, and infinite integrals.

Geometry, Groups and Dynamics/GEAR Seminar
12:00 pm   in 243 Altgeld Hall,  Thursday, February 2, 2017
 Del Edit Copy
Submitted by clein.
 Nick Vlamis (U Michigan Math)Algebraic and topological properties of big mapping class groupsAbstract: There has been a recent surge in studying surfaces of infinite type, i.e. surfaces with infinitely-generated fundamental groups. In this talk, we will focus on their mapping class groups, often called big mapping class groups. In contrast to the finite-type case, there are many open questions regarding the basic algebraic and topological properties of big mapping class groups. I will discuss several such questions and provide some answers. In particular, I will focus on automorphisms of pure mapping class groups and topological generating sets. This work is joint with Priyam Patel.

Mathematics Colloquium
4:00 pm   in 245 Altgeld Hall,  Thursday, February 2, 2017
 Del Edit Copy
Submitted by kapovich.
 Ken McLaughlin (Colorado State)Random matrices, d-bar problems, and approximation theoryAbstract: Some surprising questions in analysis arise in the interconnections of the topics in the title. We will encounter zeros of the Taylor approximants of exp(z), and other analytic functions. We will consider questions of support of equilibrium charge distributions in the plane. Semi-classical analysis of d-bar problems will provide merriment along the way.