Seminar Calendar
for events the day of Friday, October 16, 2009.

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Friday, October 16, 2009

Algebra, Geometry and Combinatorics Seminar
3:00 pm   in 445 Altgeld Hall,  Friday, October 16, 2009
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Submitted by llpku.
Aaron Lauve (Texas A&M University)
Skew Littlewood Richardson rules from Hopf algebras
Abstract: We use the rational action of a Hopf algebra on its dual to study products of skew Schur functions in the ring of symmetric functions. The result is a version of the Littlewood-Richardson rule for skew Schur functions that simplifies, and proves, a conjecture of Assaf and McNamara (recent preprint). We also establish similar skew Littlewood-Richardson formulas for Schur P- and Q-functions, and the noncommutative ribbon Schur functions of Gelfand, Krob, et al. (1991). (This is joint work with Thomas Lam and Frank Sottile.)

Graduate Analysis Seminar
4:00 pm   in 341 Altgeld Hall,  Friday, October 16, 2009
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Submitted by wgreen4.
Jesse Miller (Department of Mathematics, University of Illinois)
Nonstandard Analysis and an Application to Liftings
Abstract: I shall give an introduction to nonstandard analysis and its techniques, and, time permitting, discuss an application to liftings.

Model Theory and Descriptive Set Theory
4:00 pm   in 345 Altgeld Hall,  Friday, October 16, 2009
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Submitted by w-henson.
C. Ward Henson (UIUC Math)
Sums and Products, VII
Abstract: This week we'll start looking at section 2 in Udi Hrushovski's paper "Stable group theory and approximate subgroups". In the arXiv, this is paper 0909.2190v2 [math.LO]