Brauer group of moduli of parabolic symplectic bundles

Abstract

Let $X$ be a smooth connected complex projective curve of genus $g$, with $g\ge 3$. Fix an integer $r\ge 2$, a finite subset $D\subset X$, and a line bundle $L$ on $X$. We compute the Brauer group of the smooth locus of the moduli space of parabolic symplectic stable bundles of rank $r$ on $X$ equipped with a symplectic form taking values in $L(D)$, where $L(D)$ is given the trivial parabolic structure.

18 pages; to appear in Manuscripta Mathematica