Generically finite Prym maps

Moduli and Algebraic Cycles

07 September 13:15 - 14:15

Angela Ortega - Humboldt-Universität zu Berlin

"Given a finite morphism between smooth projective curves one can canonically associate to it a polarised abelian variety, the Prym variety. This induces a map from the moduli space of coverings to the moduli space of polarised abelian varieties, known as the Prym map. It is a classical result that the Prym map is generically injective for étale double coverings over curves of genus at least 7. In this talk I will show the global injectivity of the Prym map for ramified double coverings over curves of genus g ≥ 1 and ramified in at least 6 points. This is a joint work with J.C. Naranjo. I will finish with an overview on what is known for the degree of the Prym map for ramified cyclic coverings of degree d ≥ 2."

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John Christian Ottem
University of Oslo
Dan Petersen
Stockholm University
David Rydh
KTH Royal Institute of Technology


Dan Petersen


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