Discrete Integrable Systems and Hodograph Transformations Arising from Motions of Discrete Plane Curves

Details Discrete Integrable Systems and Hodograph Transformations Arising from Motions of Discrete Plane Curves Discrete Integrable Systems and Hodograph Transformations Arising from Motions of Discrete Plane Curves

2011-07-06

arxiv.org/abs/1107.1148v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

19 pages

Scientific paper

We consider integrable discretizations of some soliton equations associated with the motions of plane curves: the Wadati-Konno-Ichikawa elastic beam equation, the complex Dym equation, and the short pulse equation. They are related to the modified KdV or the sine-Gordon equations by the hodograph transformations. Based on the observation that the hodograph transformations are regarded as the Euler-Lagrange transformations of the curve motions, we construct the discrete analogues of the hodograph transformations, which yield integrable discretizations of those soliton equations.

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