Seminar Calendar
for events the day of Friday, November 20, 2009.

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Friday, November 20, 2009

Women in Mathematics Seminar
1:00 pm   in 141 Altgeld Hall,  Friday, November 20, 2009
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Submitted by akwiatk2.
Isidora Milin (UIUC Math)
Flexibility and Rigidity in Symplectic and Contact Worlds
Abstract: I will begin by introducing some basic notions of symplectic and contact geometry and explain how they arise from considerations in classical mechanics. Nonexistence of local invariants - all symplectic (contact) manifolds are locally "the same" - will be contrasted with a rich theory of global invariants. I'll finish by discussing an amusing theorem of Gromov (and its contact-geometric analogues) - that there is no way for a symplectic camel to go through the eye of a needle.

Model Theory and Descriptive Set Theory
4:00 pm   in 345 Altgeld Hall,  Friday, November 20, 2009
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Submitted by w-henson.
Lou van den Dries (UIUC Math)
Sums and Products, XII
Abstract: This week we'll continue looking at section 3 in Udi Hrushovski's paper "Stable group theory and approximate subgroups", with a focus on understanding the statement of the main theorem (Theorem 3.4) and proving some of its consequences. In the arXiv, this is paper 0909.2190v2 [math.LO]