AUTOMORPHISMS OF MODULI SPACES OF SYMPLECTIC BUNDLES

Author:

BISWAS INDRANIL1,GÓMEZ TOMAS L.2,MUÑOZ VICENTE3

Affiliation:

1. School of Mathematics, Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay 400005, India

2. Instituto de Ciencias Matemáticas, (CSIC-UAM-UC3M-UCM), C/Nicolás Cabrera 13-15, Campus Cantoblanco, 28049 Madrid, Spain

3. Facultad de Ciencias Matemáticas, Universidad Complutense de Madrid, Plaza Ciencias 3, 28040 Madrid, Spain

Abstract

Let X be an irreducible smooth complex projective curve of genus g ≥ 4. Fix a line bundle L on X. Let MSp(L) be the moduli space of semistable symplectic bundles (E, φ : E ⊗ E → L) on X, with the symplectic form taking values in L. We show that the automorphism group of MSp(L) is generated by the automorphisms of the form E ↦ E ⊗ M, where [Formula: see text], together with the automorphisms induced by automorphisms of X.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Mathematics

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