English

A logarithmic interpretation of Edixhoven's jumps for Jacobians

Algebraic Geometry 2014-03-24 v1

Abstract

Let AA be an abelian variety over a discretely valued field. Edixhoven has defined a filtration on the special fiber of the N\'eron model of AA that measures the behaviour of the N\'eron model under tame base change. We interpret the jumps in this filtration in terms of lattices of logarithmic differential forms in the case where AA is the Jacobian of a curve CC, and we give a compact explicit formula for the jumps in terms of the combinatorial reduction data of CC.

Keywords

Cite

@article{arxiv.1403.5538,
  title  = {A logarithmic interpretation of Edixhoven's jumps for Jacobians},
  author = {Dennis Eriksson and Lars Halvard Halle and Johannes Nicaise},
  journal= {arXiv preprint arXiv:1403.5538},
  year   = {2014}
}