Enumerative geometry, tau-functions and Heisenberg-Virasoro algebra
  In this paper we establish relations between three enumerative geometry tau-functions, namely the Kontsevich-Witten, Hurwitz and Hodge tau-functions. The relations allow us to describe the tau-functions in terms of matrix integrals, Virasoro constraints and Kac-Schwarz operators. All constructed operators belong to the algebra (or group) of symmetries of the KP hierarchy. 
A. Alexandrov
hep-th math-ph math.CO math.MP nlin.SI