On the signed euler characteristic property for subvarieties of abelian varieties

Eva Elduque, Christian Geske, Laurentiu Maxim

Research output: Contribution to journalArticlepeer-review

Abstract

We give an elementary proof of the fact that a pure-dimensional closed subvariety of a complex abelian variety has a signed intersection homology Euler characteristic. We also show that such subvarieties which, moreover, are local complete intersections, have a signed Euler-Poincaré characteristic. Our arguments rely on the construction of circle-valued Morse functions on such spaces, and use in an essential way the stratified Morse theory of Goresky-MacPherson. Our approach also applies (with only minor modifications) for proving similar statements in the analytic context, i.e., for subvarieties of compact complex tori. Alternative proofs of our results can be given by using the general theory of perverse sheaves.

MSC Codes 58K05, 32S60, 14K12

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Jan 10 2018
Externally publishedYes

Keywords

  • Abelian variety
  • Intersection homology
  • Morse function
  • Signed Euler characteristic
  • Stratification
  • Stratified Morse theory

ASJC Scopus subject areas

  • General

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