Nonlinear Sciences – Exactly Solvable and Integrable Systems
Scientific paper
2008-11-13
Nonlinear Sciences
Exactly Solvable and Integrable Systems
11 pages by AMS latex style; To appear in Chinese Quarterly Journal of Mathematics 24(2009)
Scientific paper
We give a straightforward derivation of the string equation and Virasoro
constraints on the $\tau$ function of the BKP hierarchy by means of some
special additional symmetry flows. The explicit forms of the actions of these
additional symmetry flows on the wave function and then the negative Virasoro
generators $L_{-k}$ are given, where $k$ is a positive integer.
Foerster Angela
He Jingsong
Tian Kelei
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