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Self-duality in quantum K-theory


October 20, 2020      8:00 pm
Speaker: Henry Liu - Columbia University

When we upgrade from equivariant cohomology to equivariant K-theory, many important algebraic/geometric tools such as dimensional vanishing become inapplicable in general. I will explain some nice conditions we can impose on K-theory...
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Stringy invariants and toric Artin stacks


October 20, 2020      3:00 pm
Speaker: Jeremy Usatine - Brown University

Stringy Hodge numbers are certain generalizations, to the singular setting, of Hodge numbers. Unlike usual Hodge numbers, stringy Hodge numbers are not defined as dimensions of cohomology groups. Nonetheless, an...
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Exploring small fusion rings and tensor categories


October 20, 2020      10:00 am
Speaker: Joost Slingerland - National University of Ireland, Maynooth

I discuss some strategies for finding fusion rings of low rank (or if you prefer, fusion rules for a small number of objects) and corresponding tensor categories, or solutions to...
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CMSA Strongly Correlated Quantum Materials and High-Temperature Superconductors Series: Universality vs materials-dependence in cuprates: New signatures of the pseudogap phase of cuprate superconductors


October 15, 2020      10:30 am
Speaker: Louis Taillefer - University of Sherbrooke

The pseudogap phase of cuprate superconductors is arguably the most enigmatic phase of quantum matter. We aim to shed new light on this phase by investigating the non- superconducting ground state of...
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The Bloch–Kato conjecture for GSp(4)


October 14, 2020      3:00 pm
Speaker: David Loeffler - University of Warwick

The Bloch--Kato conjecture predicts that the dimension of the Selmer group of a global Galois representation is equal to the order of vanishing of its L-function. In this talk, I...
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