Department of

# Mathematics

Seminar Calendar
for events the day of Tuesday, May 29, 2018.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
      April 2018              May 2018              June 2018
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  5  6  7          1  2  3  4  5                   1  2
8  9 10 11 12 13 14    6  7  8  9 10 11 12    3  4  5  6  7  8  9
15 16 17 18 19 20 21   13 14 15 16 17 18 19   10 11 12 13 14 15 16
22 23 24 25 26 27 28   20 21 22 23 24 25 26   17 18 19 20 21 22 23
29 30                  27 28 29 30 31         24 25 26 27 28 29 30



Tuesday, May 29, 2018

12:00 pm in 243 Altgeld Hall ,Tuesday, May 29, 2018

#### Fibering of 3-manifolds and related groups

###### Dawid Kielak (University of Bielefeld )

Abstract: We will take a new look at Thurston's results on the structure of fibrings of 3-manifolds from a more algebraic perspective. This will allow us to generalise these results to (many) Poincare duality groups in dimension 3, and to (all) free-by-cyclic groups.

2:00 pm in 241 Altgeld Hall,Tuesday, May 29, 2018

#### Wall-crossing phenomena for Newton-Okounkov bodies

###### Laura Escobar (UIUC)

Abstract: A Newton-Okounkov body is a convex set associated to a projective variety, equipped with a valuation. These bodies generalize the theory of Newton polytopes. Work of Kaveh-Manon gives an explicit link between tropical geometry and Newton-Okounkov bodies. We use this link to describe a wall-crossing phenomenon for Newton-Okounkov bodies. As an application we show how the wall-crossing formula for the tropicalization of Gr(2, n) is an instance of our phenomenon for Newton-Okounkov bodies. Joint work with Megumi Harada.