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Article Dans Une Revue Michigan Mathematical Journal Année : 2002

Self-duality of Coble's quartic hypersurface and applications

Résumé

The moduli space M_0 of semi-stable rank 2 vector bundles with fixed trivial determinant over a non-hyperelliptic curve C of genus 3 is isomorphic to a quartic hypersurface in P^7 (Coble's quartic). We show that M_0 is self-dual and that its polar map associates to a stable bundle E \in M_0 a bundle F which is characterized by dim H^0(C, E \otimes F) = 4. The projective space PH^0(C, E \otimes F) is equipped with a net of quadrics \Pi and it is shown that the map which associates to E \in M_0 the isomorphism class of the plane quartic Hessian curve of \Pi is a dominant map to the moduli space of genus 3 curves.

Dates et versions

hal-00129440 , version 1 (07-02-2007)

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Christian Pauly. Self-duality of Coble's quartic hypersurface and applications. Michigan Mathematical Journal, 2002, 50, pp.551-574. ⟨hal-00129440⟩
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