On commuting ordinary differential operators with polynomial   coefficients corresponding to spectral curves of genus two
  The group of automorphisms of the first Weyl algebra acts on commuting ordinary differential operators with polynomial coefficient. In this paper we prove that for fixed generic spectral curve of genus two the set of orbits is infinite. 
Valentina N. Davletshina, Andrey E. Mironov
math-ph math.MP math.RA math.SP nlin.SI