Events and Activities

Organizers:Simone Giombi, Mina Himwich, Silviu Pufu, Zimo Sun

Registration is free but required:
https://docs.google.com/forms/d/e/1FAIpQLSfAFXAzzzsa_NQPAo9GikFLoqRKH-G0VFl4OSlQ8VOVYFptfQ/viewform

Quantum field theories on spherical geometries are...

This film screening is curated by School of Social Science Member Leszek Koczanowicz and Visitor Dorota Koczanowicz.

Caught in the Belarus...

We will discuss combinatorial and algebraic aspects of regular Hessenberg varieties, a large class of subvarieties of the flag variety G/B. For the special case of Peterson varieties, we show their equivariant structure constants are non-negative...

There is a bijection between solutions of the Kadomtsev-Petiashvili (KP) hierarchy and points on an infinite Grassmannian, now often simply referred to as "the Sato Grassmannian". This connection is made via the Plücker coordinates, the expansion...

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Expansion is an important notion in graphs, and comes in several equivalent formulations, including (1) convergence of random walks, (2) having no small cuts, and (3) having a large spectral gap. I will talk about a higher dimensional generalization...

Organizers:Simone Giombi, Mina Himwich, Silviu Pufu, Zimo Sun

Registration is free but required:
https://docs.google.com/forms/d/e/1FAIpQLSfAFXAzzzsa_NQPAo9GikFLoqRKH-G0VFl4OSlQ8VOVYFptfQ/viewform

Quantum field theories on spherical geometries are...

Given a triple (X,π,s) consisting of a homogeneous space X=G/P, a dominant weight π giving a projective embedding of X, and a reduced expression s for the minimal coset representative of w_0 in the parabolic quotient W/W_P, we construct a polytope...