Automorphism fixed points in the moduli space of semistable bundles
  Given an automorphism of a smooth complex algebraic curve, there is an induced action on the moduli space of semi-stable rank 2 holomorphic bundles with fixed determinant. We give a complete description of the fixed variety in terms of moduli spaces of parabolic bundles on the quotient curve. 
Jorgen Ellegaard Andersen and Jakob Grove