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arXiv · 2110.15876

An integrable semi-discretization of the modified Camassa-Holm equation with linear dispersion term

Han-Han Sheng·Guo-Fu Yu·Bao-Feng Feng
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Abstract

In the present paper, we are concerned with integrable discretization of a modified Camassa-Holm equation with linear dispersion term. The key of the construction is the semi-discrete analogue for a set of bilinear equations of the modified Camassa-Holm equation. Firstly, we show that these bilinear equations and their determinant solutions either in Gram-type or Casorati-type can be reduced from the discrete KP equation through Miwa transformation. Then, by scrutinizing the reduction process, we obtain a set of semi-discrete bilinear equations and their general soliton solution in Gram-type or Casorati-type determinant form. Finally, by defining dependent variables and discrete hodograph transformations, we are able to derive an integrable semi-discrete analogue of the modified Camassa-Holm equation. It is also shown that the semi-discrete modified Camassa-Holm equation converges to the continuous one in the continuum limit.

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Han-Han Sheng, Guo-Fu Yu, Bao-Feng Feng. 2021-10-29. An integrable semi-discretization of the modified Camassa-Holm equation with linear dispersion term. https://arxiv.org/abs/2110.15876

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