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VOLUME 58 | ISSUE 8 | PAGE 598
Gravitational descendants as generators of diffeomorphisms of the target space in topological Landau - Ginzburg gravity
We study flows on the space of topological Landau-Gxnsburg theories coupled to topological gravity. We argue that flows corresponding to gravitational descendants change the target space from a complex plane to a punctured complex plane and lead to the motion of punctures It is shown that the evolution of the topological theory due to these flows is given by dispersionless limit of KP hierarchy.