Department of

# Mathematics

Seminar Calendar
for events the day of Monday, February 11, 2019.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
     January 2019          February 2019            March 2019
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1  2  3  4  5                   1  2                   1  2
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Monday, February 11, 2019

3:00 pm in 243 Altgeld Hall,Monday, February 11, 2019

#### Rigidity of Lie groupoids and foliations

###### Rui Loja Fernandes (UIUC)

Abstract: I will discuss a result stating that a compact, Hausdorff, Lie groupoid is rigid. i.e., has no non-trivial deformations. As an application of this result, it follows that a compact, Hausdorff foliation is rigid if and only if the generic leaf has trivial 1st cohomology. This is closely related to old stability results for foliations due to Epstein, Rosenberg and Hamilton. This talk is based on joint work with Matias del Hoyo.

5:00 pm in 241 Altgeld Hall,Monday, February 11, 2019