Regular functions on spherical nilpotent orbits in complex symmetric   pairs: classical Hermitian cases
  Given a classical semisimple complex algebraic group G and a symmetric pair (G,K) of Hermitian type, we study the closures of the spherical nilpotent K-orbits in the isotropy representation of K. We show that all such orbit closures are normal and describe the K-module structure of their ring of regular functions. 
Paolo Bravi, Jacopo Gandini
math.RT math.AG