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Hodge Integrals and Integrable Hierarchies

Jian Zhou

math.AGarXiv:math/0310408

Abstract

We show that the generating series of some Hodge integrals involving one or two partitions are tau-functions of the KP hierarchy or the 2-Toda hierarchy respectively. We also formulate a conjecture on the connection between relative invariants and integrable hierarchies. The conjecture is verified in some examples.

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