CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 10, 2022 9:30 amWe consider the Cauchy problem for the Einstein equations for cosmological spacetimes, i.e. spacetimes with compact spatial hypersurfaces. Various classes of those dynamical spacetimes have been constructed and analyzed using...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 10, 2022 9:00 amThe gig economy provides workers with the benefits of autonomy and flexibility, but it does so at the expense of work identity and co-worker bonds. Among the many reasons why...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 10, 2022 8:00 pmWe present computations of the thermal Hall coefficient of phonons scattering off defects with multiple energy levels. Using a microscopic formulation based on the Kubo formula, we find that the...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 9, 2022 9:30 amThe low dimensional manifold hypothesis posits that the data found in many applications, such as those involving natural images, lie (approximately) on low dimensional manifolds embedded in a high dimensional Euclidean...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 9, 2022 2:00 pmWe automatically solve, explain, and generate university-level course problems from thirty STEM courses (at MIT, Harvard, and Columbia) for the first time. We curate a new dataset of course questions...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 9, 2022 10:30 amMotivated by a puzzle arising from recent work on staggered lattice fermions we introduce Kaehler-Dirac fermions and describe their connection both to Dirac fermions and staggered fermions. We show that they...
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CMSA GENERAL RELATIVITY SEMINAR, SEMINARS
March 8, 2022 9:00 amThe random greedy algorithm for finding a maximal independent set in a graph has been studied extensively in various settings in combinatorics, probability, computer science, and chemistry. The algorithm builds...
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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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