Department of

# Mathematics

Seminar Calendar
for events the day of Monday, March 13, 2017.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
    February 2017            March 2017             April 2017
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             1  2  3  4                      1
5  6  7  8  9 10 11    5  6  7  8  9 10 11    2  3  4  5  6  7  8
12 13 14 15 16 17 18   12 13 14 15 16 17 18    9 10 11 12 13 14 15
19 20 21 22 23 24 25   19 20 21 22 23 24 25   16 17 18 19 20 21 22
26 27 28               26 27 28 29 30 31      23 24 25 26 27 28 29
30


Monday, March 13, 2017

4:00 pm in 243 Altgeld Hall,Monday, March 13, 2017

#### Deformations of log symplectic structures on surfaces

###### Melinda Lanius (UIUC)

Abstract: A star log symplectic bi-vector on a surface has a degeneracy loci locally modelled by a finite set of lines in the plane intersecting at a point. We will discuss two ways to capture the behaviour of their deformations: one global' and one more local' in flavor. From a global perspective, we classify all star log symplectic structures on compact surfaces up to symplectomorphism by some associated Lie algebroid de Rham cohomology classes. In a more local snap shot, we compute the Poisson cohomology of these structures and discuss the relationship of our classification and the second Poisson cohomology.

4:00 pm in 245 Altgeld Hall,Monday, March 13, 2017

#### Farey statistics and applications

###### Florin Boca (Department of Mathematics, University of Illinois)

5:00 pm in 241 Altgeld Hall,Monday, March 13, 2017

#### Embedding of Heisenberg group in L_1

###### Chris (UIUC)

Abstract: Part 2: The details