Juliette Bruce, University of California, Berkeley
Authors: Juliette Bruce, Lauren Cranton Heller, Mahrud Sayrafi
2022 AWM Research Symposium
Homological and Combinatorial Aspects of Commutative Algebra

Eisenbud and Goto described the Castelnuovo-Mumford regularity of a module on projective space in terms of three different properties of the corresponding graded module: its betti numbers, its local cohomology, and its truncations. For the multigraded generalization of regularity defined by Maclagan and Smith, these three conditions are no longer equivalent. I will characterize each of them for modules on products of projective spaces.

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