Department of

# Mathematics

Seminar Calendar
for events the day of Monday, March 5, 2018.

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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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Monday, March 5, 2018

3:00 pm in Engineering Hall 106B1,Monday, March 5, 2018

#### Multiplicative Norms

###### Tsutomu Okano (UIUC Math)

Abstract: I will introduce the idea of multiplicative norms in equivariant and motivic homotopy theories. This is a necessary structure behind the theory of genuine rings, which are supposed to be like E_\infty algebras with additional multiplication structure. For example, in equivariant orthogonal spectra, norms help us establish a model structure on commutative rings that plays well with restriction along the inclusion of a subgroup. In motivic homotopy theory, there is a formulation of norms in terms of infinity-categorical Grothendieck construction. I will show that although this is a nice way to package the story, it is difficult to work with in terms of computations.

4:00 pm in 245 Altgeld Hall,Monday, March 5, 2018

#### What To Expect In Your Second Year, A Panel

###### Dana Neidinger, Tsin-Po Wang, Heyi Zhu (Department of Mathematics, University of Illinois at Urbana-Champaign)

Abstract: We will have a presentation and Q&A session on what might happen after one's first year in our PhD program.

5:00 pm in 241 Altgeld Hall,Monday, March 5, 2018

#### Cost and treeability of pmp equivalence relations

###### Anush Tserunyan (Illinois Math)

Abstract: We will continue the introduction to the theory of cost and discuss its relation to treeable probability measure preserving equivalence relations.