Department of

# Mathematics

Seminar Calendar
for events the day of Friday, December 6, 2013.

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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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1  2    1  2  3  4  5  6  7             1  2  3  4
3  4  5  6  7  8  9    8  9 10 11 12 13 14    5  6  7  8  9 10 11
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Friday, December 6, 2013

4:00 pm in 241 Altgeld Hall,Friday, December 6, 2013

#### From curves to train tracks

###### Ser-Wei Fu (UIUC Math)

Abstract: In this talk, I plan to introduce the concept of train tracks used in the study of geometric topology. The first half will be dedicated to various mathematical objects that arise from the study of curves. Closed curves are fascinating but simple objects that serve as great starting point for both geometers and topologists. The second half of the talk will focus on defining and explaining why train tracks are interesting.

4:00 pm in 345 Altgeld Hall,Friday, December 6, 2013

#### Invariant measures on families of countable structures

###### Aristotelis Panagiotopoulos (UIUC)

Abstract: In the talk, we will go over the work of Ackerman, Freer and Patel in "Invariant measures concentrated on countable structures" describing a construction of a permutation invariant measure on copies of a countable structure.