Department of

# Mathematics

Seminar Calendar
for events the day of Monday, November 14, 2016.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
     October 2016          November 2016          December 2016
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1          1  2  3  4  5                1  2  3
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Monday, November 14, 2016

3:00 pm in 243 Altgeld Hall,Monday, November 14, 2016

#### Elevator pitch workshop

Abstract: We've invited people from the graduate college to run their elevator pitch workshop just for us! Come learn how to explain your work quickly and effectively to different audiences!

4:00 pm in 241 Altgeld Hall,Monday, November 14, 2016

#### Wall-crossing for mutations of Lagrangian tori, and symplectic cohomology

###### Dmitry Tonkonog (Uppsala)

Abstract: Given a Lagrangian torus with an attached Lagrangian disk, a procedure called mutation produces a new Lagrangian torus. Iterating this procedure allows to construct infinitely many monotone Lagrangian tori in del Pezzo surfaces, which was done by Vianna. We prove the wall-crossing formula which solves the problem of enumerating Maslov index 2 holomorphic disks on these tori. This is joint work in progress with James Pascaleff.

4:00 pm in 245 Altgeld Hall,Monday, November 14, 2016

#### Logic and the pseudoarc

###### Slawomir Solecki (Department of Mathematics, University of Illinois)

Abstract: The pseudoarc is a remarkable (the most remarkable?) compact connected space. It is the (unique) generic, in a precise sense, compact connected metric space. It is also quite concrete being a compact subset of the plane. I will explain connections between the pseudoarc and methods of mathematical logic.

5:00 pm in Altgeld Hall 241,Monday, November 14, 2016

#### II_1 Factors with non-isomorphic ultrapowers

###### Stephen Longfield (UIUC)

Abstract: We will wrap up our exploration, over the last 2 weeks, of the recent results due to Boutonnet, Chifan, and Ioana establishing the existence of uncountably many II_1 factors with non-isomorphic ultrapowers.

5:20 pm in Altgeld Hall 241,Monday, November 14, 2016