Crepant resolutions have inspired connections between birational geometry, derived categories, representation theory, and motivic integration. In this talk, we give a new characterization of log terminal singularities in term of crepant resolutions by stacks. We additionally prove a motivic McKay correspondence, giving the first known description for stringy Hodge numbers in terms of motivically integrating a function that takes only finitely many values. No prior knowledge of stacks will be assumed. This is joint work with Jeremy Usatine.
Algebraic Geometry Seminar
Monday, April 28, 2025 - 3:30pm
Matthew Satriano
University of Waterloo
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