The Equivariant Gromov--Witten Theory of CP^1 and Integrable hierarchies

Details The Equivariant Gromov--Witten Theory of CP^1 and Integrable hierarchies The Equivariant Gromov--Witten Theory of CP^1 and Integrable hierarchies

2005-08-26

arxiv.org/abs/math-ph/0508054v3

Physics

Mathematical Physics

18 pages

Scientific paper

We construct an integrable hierarchy in terms of vertex operators and Hirota Quadratic Equations (HQE shortly) and we show that the equivariant total descendant potential of $\C P^1$ satisfies the HQE. Our prove is based on the quantization formalism developed in \cite{G1}, \cite{G2}, and on the equivariant mirror model of $\C P^1.$ The vertex operators in our construction obey certain transformation law under change of coordinates, which might be important for generalizing the HQE to other manifolds. We also show that under certain change of the variables, which is due to E. Getzler, the HQE are transformed into the HQE of the 2-Toda hierarchy. Thus we obtain a new proof of the equivariant Toda conjecture.

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