Categorical measures for finite group actions

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Documents

  • D. Bergh
  • S. Gorchinskiy
  • M. Larsen
  • V Lunts
Given a variety with a finite group action, we compare its equivariant categorical measure, that is, the categorical measure of the corresponding quotient stack, and the categorical measure of the extended quotient. Using weak factorization for orbifolds, we show that for a wide range of cases that these two measures coincide. This implies, in particular, a conjecture of Galkin and Shinder on categorical and motivic zeta-functions of varieties. We provide examples showing that, in general, these two measures are not equal. We also give an example related to a conjecture of Polishchuk and Van den Bergh, showing that a certain condition in this conjecture is indeed necessary.
Original languageEnglish
JournalJournal of Algebraic Geometry
Volume30
Issue number4
Pages (from-to)685-757
ISSN1056-3911
DOIs
Publication statusPublished - 2021

ID: 284773147