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FAST TRACK COMMUNICATION
2009 J. Phys. A: Math. Theor. 42 472002 (11pp) doi: 10.1088/1751-8113/42/47/472002
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Abstract. We present a Lagrangian for the bilinear discrete KP (or Hirota–Miwa) equation. Furthermore, we show that this Lagrangian can be extended to a Lagrangian 3-form when embedded in a higher dimensional lattice, obeying a closure relation. Thus we establish the multiform structure as proposed in Lobb and Nijhoff (2009 J. Phys. A: Math. Theor. 42 454013) in a higher dimensional case.
PACS numbers: 45.20.Jj, 02.30.Ik, 04.20.Fy
Mathematics Subject Classification: 39A99, 49N99, 35Q51
Print publication: Issue 47 (27 November 2009) |
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