DATE	SPEAKER	TITLE (click to show abstract)
January 25th	Eugene Gorsky UC Davis	Algebraic weaves and braid varieties In the talk I will define braid varieties, a class of affine algebraic varieties associated to positive braids, and develop a Soergel-like diagrammatic calculus for correspondences between them. The braid varieties are closely related to augmentation varieties for Legendrian links, and the correspondences provide an algebraic machinery to study exact Lagrangian fillings of such links. This is a joint work with Roger Casals, Mikhail Gorsky and Jose Simental Rodriguez.
February 1st	Christopher Ryba UC Berkeley	Stable characters from permutation patterns For a fixed permutation σ∈Sk, let Nσ denote the function which counts occurrences of σ as a pattern in permutations from Sn. We study the expected value (and d-th moments) of Nσ on conjugacy classes of Sn and prove that the irreducible character support of these class functions stabilizes as n grows. This says that there is a single polynomial in the variables n,m1,…,mdk which computes these moments on any conjugacy class (of cycle type 1^m1,2^m2,⋯) of any symmetric group. Our proof is, to our knowledge, the first application of partition algebras to the study of permutation patterns. This is joint work with Christian Gaetz.
February 8th	Camille Combe Universite de Paris
February 15th	Academic Holiday - no talk
February 22nd	Nikhil Srivastava UC Berkeley
March 1st	Jonathan Novak UCSD
March 8th	Alejandro Morales UMass Amherst
March 15th	Raul Penaguiao SFSU
March 22nd	Spring Recess - no talk
March 29th	Foster Tom UC Berkeley
April 5th	Jeremy Meza UC Berkeley
April 12th	Zajj Daugherty CUNY
April 19th	Kelly Isham UC Irvine
April 26th	Yulia Alexandr UC Berkeley
May 3rd	Vasu Tewari University of Hawai'i

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