W_{N+1}-constraints for singularities of type A_N

Details W_{N+1}-constraints for singularities of type A_N W_{N+1}-constraints for singularities of type A_N

2008-11-12

arxiv.org/abs/0811.1965v1

Physics

Mathematical Physics

31 pages

Scientific paper

Using Picard--Lefschetz periods for the singularity of type $A_N$, we construct a projective representation of the Lie algebra of differential operators on the circle with central charge $h:=N+1$. We prove that the total descendant potential $\D_{A_N}$ of $A_N$-singularity is a highest weight vector. It is known that $\D_{A_N}$ can be interpreted as a generating function of a certain class of intersection numbers on the moduli space of $h$-spin curves. In this settings our constraints provide a complete set of recursion relations between the intersection numbers. Our methods are based entirely on the symplectic loop space formalism of A. Givental and therefore they can be applied to the mirror models of symplectic manifolds.

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