Intersection multiplicities over Gorenstein rings

Claudia M. Miller, Anurag K. Singh

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Let R be a complete local ring of dimension d over a perfect field of prime characteristic p, and let M be an R-module of finite length and finite projective dimension. S. Dutta showed that the equality limn→∞ ℓ (FnR(M))/pnd = ℓ(M) holds when the ring R is a complete intersection or a Gorenstein ring of dimension at most 3. We construct a module over a Gorenstein ring R of dimension five for which this equality fails to hold. This then provides an example of a nonzero Todd class τ3 (R), and of a bounded free complex whose local Chern character does not vanish on this class.

Original languageEnglish (US)
Pages (from-to)155-171
Number of pages17
JournalMathematische Annalen
Volume317
Issue number1
DOIs
StatePublished - May 2000

ASJC Scopus subject areas

  • Mathematics(all)

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