The integral Chow ring of ${\mathcal{R}}_2$

Abstract

In this paper we compute the integral Chow ring of the moduli stack ${\mathcal{R}}_2$ of Prym pairs of genus 2 with integral coefficients.

arXiv comment24 pages. Comments are welcome. Version to appear in Annali della Scuola Normale Superiore di Pisa - Classe di Scienze