Webs and multiwebs for the symplectic group

Fri Feb 21, 2025 10:00 a.m.—11:00 a.m.
Exterior of Sheffield-Sterling-Strathcona Hall featuring a stone carving of Yale's coat of arms and motto

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Seminar: 
Friday Mornings

Event time: 
Friday, February 21, 2025 - 10:00am

Location: 
KT 801

Speaker: 
Haihan Wu

Speaker affiliation: 
John Hopkins

Event description: 
The dimer model is a statistical mechanical model that studies random dimer covers (perfect matchings) of a graph. Web categories are developed to compute the Witten-Reshetikhin-Turaev quantum invariants and to study the representations of quantum groups. 

Kasteleyn’s theorem computes the number of dimer covers of a graph by calculating the determinant of a modified adjacency matrix. The generalizations of the theorem connect generalized dimer models to type A web categories. I will talk about further generalizations to the type C cases, relaxing the bipartiteness condition of the underlying graph. This talk is based on joint work with Richard Kenyon.