Symmetries of the Kadomstev-Petviashvili Hierarchy
arXiv:hep-th/9403005
Abstract
The relation between the $\widehat{\Sl}(\infty)$ algebra of flows commuting with the KP hierarchy and the Kac-Moody-Virasoro Lie point symmetries of individual equations is established. This is used to calculate the point symmetries for all equations in the hierarchy.
4 pages, CRM-2149