### Tuesday, 19 July 2016

#### Combinatorics Seminar

*On the f-vectors of Gelfand-Cetlin polytopes*at 10:00a.m. in VinH 113

**Jang Soo Kim**(

*SKKU*)

A Gelfand-Cetlin polytope is a convex polytope obtained as an image of certain completely integrable system on a partial flag variety. In this talk, we ...
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Please send an email to mchmutov@GMAIL.com for more information.

*Schur-positivity and geometric grid classes of permutations*at 11:15a.m. in VinH 113

**Yuval Roichman**(

*Bar-Ilan University, Israel*)

Characterizing sets of permutations whose associated quasisymmetric function is symmetric in a long-standing problem in algebraic combinatorics. We present a general method to construct symmetric ...
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Please send an email to mchmutov@GMAIL.com for more information.