Variational Bihamiltonian Cohomologies and Integrable Hierarchies II: Virasoro symmetries
arXiv:2109.01845 · doi:10.1007/s00220-022-04433-7
Abstract
We prove that for any tau-symmetric bihamiltonian deformation of the tau-cover of the Principal Hierarchy associated with a semisimple Frobenius manifold, the deformed tau-cover admits an infinite set of Virasoro symmetries.