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Zbl 1110.35332
Xiao, Ting; Zeng, Yunbo
The quasiclassical limit of the symmetry constraint of the KP hierarchy and the dispersionless KP hierarchy with self-consistent sources. (English)
[J] J. Nonlinear Math. Phys. 13, No. 1-4, 193-204 (2006). ISSN 1402-9251; ISSN 1776-0852/e

Summary: We show that the quasiclassical limit of the symmetry constraint of the Sato operator for the KP hierarchy leads to the generalized Zakharov reduction of the Sato function for the dispersionless KP (dKP) hierarchy. By either regarding the symmetry constrained dKP hierarchy as its stationary case or taking the dispersionless limit of the KP hierarchy with self-consistent sources directly, we construct a new integrable dispersionless hierarchy, i.e., the dKP hierarchy with self-consistent sources and find its associated conservation equations (or equations of Hamilton-Jacobi type). Some solutions of the dKP equation with self-consistent sources are also obtained by hodograph transformations.

MSC 2000:: *35Q53 KdV-like equations
37K05 Hamiltonian structures, etc.

Keywords: symmetry constraint; Zakharov reduction; integrable dispersionless hierarchy; hodograph transformations

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