CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 3, 2022 9:30 amIn this talk we will discuss the interaction between magnetic monopoles and massless fermions. In the 1980's Callan and Rubakov showed that in the simplest example and that fermion-monopole interactions...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 3, 2022 9:00 amWhile over-parameterization is widely believed to be crucial for the success of optimization for the neural networks, most existing theories on over-parameterization do not fully explain the reason -- they...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 2, 2022 9:30 amWe consider SL_n-local systems on graphs on surfaces and show how the associated Kasteleyn matrix can be used to compute probabilities of various topological events involving the overlay of n...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 2, 2022 10:30 amWe construct infinitely many new exactly solvable local commuting projector lattice Hamiltonian models for general bosonic beyond group cohomology invertible topological phases of order two and four in any spacetime...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 1, 2022 9:00 amEugene Wachspress introduced polypols as real bounded semialgebraic sets in the plane that generalize polygons. He aimed to generalize barycentric coordinates from triangles to arbitrary polygons and further to polypols....
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
February 24, 2022 9:00 amIn this talk we describe a new method to study the singular set in the obstacle problem. This method does not depend on monotonicity formulae and works for fully nonlinear...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
February 24, 2022 8:00 pmThree-dimensional (3d) gapped topological phases with fractional excitations are divided into two subclasses: One has topological order with point-like and loop-like excitations fully mobile in the 3d space, and the...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
February 24, 2022 1:00 pmThe spontaneous emergence of collective flows is a generic property of active fluids and often leads to chaotic flow patterns characterized by swirls, jets, and topological disclinations in their orientation...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
February 23, 2022 10:30 amIn this sequence of talks, I will describe our work with Alexander Frenkel and Stephen Randall, in which we presented a novel topological quantum gravity, relating three previously unrelated fields: ...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
February 22, 2022 9:30 amWe construct a certain type of Gauged Linear Sigma Model quasimap invariants that generalize the original ones and are easier to compute. Higgs-Coulomb correspondence provides identification of generating functions of...
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