Association Journal of CSIAM
Supervised by Ministry of Education of PRC
Sponsored by Xi'an Jiaotong University
ISSN 1005-3085  CN 61-1269/O1

Chinese Journal of Engineering Mathematics ›› 2021, Vol. 38 ›› Issue (5): 691-699.doi: 10.3969/j.issn.1005-3085.2021.05.008

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The Correspondence between the Dual NLS Hierarchy and the Derivative NLS Hierarchy

GUO Mingyue1,2,   KANG Ting1,2,   WANG Yunbo1,2   

  1. 1. School of Mathematics, Northwest University, Xi'an 710127
    2. Center for Nonlinear Studies, Northwest University, Xi'an 710069
  • Online:2021-10-15 Published:2021-12-15
  • Supported by:
    The Natural Science Foundation of Shaanxi Province (2019JC-28).

Abstract:

In this paper, we study the one-to-one correspondence between the dual NLS hierarchy and derivative NLS hierarchy, and associated Hamiltonian conservation laws. The first part, we give the correspondence between these two recursion operators according to the gauge transformation between the dual NLS and derivative NLS equations. And base on these relationships, we prove that these two equation hierarchies have the same gauge transformation. The sencond part, we propose the correspondence between these two equation hierarchies about the variation derivative of Hamiltonian functional. And then, we obtain to the relationship about their associated Hamiltonian conservation laws.

Key words: gauge transformation, tri-Hamiltonian duality, recursion operator, Hamiltonian conservation law

CLC Number: