Integrable Semi-Discretization for a Modified Camassa-Holm Equation with Cubic Nonlinearity

• Опубліковано в: : Symmetry, Integrability and Geometry: Methods and Applications
• Дата: 2024
• Автори: Feng, Bao-Feng, Hu, Heng-Chun, Sheng, Han-Han, Yin, Wei, Yu, Guo-Fu
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Інститут математики НАН України 2024
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/212604
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Integrable Semi-Discretization for a Modified Camassa-Holm Equation with Cubic Nonlinearity. Bao-Feng Feng, Heng-Chun Hu, Han-Han Sheng, Wei Yin and Guo-Fu Yu. SIGMA 20 (2024), 091, 14 pages

In the present paper, an integrable semi-discretization of the modified Camassa-Holm (mCH) equation with cubic nonlinearity is presented. The key points of the construction are based on the discrete Kadomtsev-Petviashvili (KP) equation and an appropriate definition of discrete reciprocal transformations. First, we demonstrate that these bilinear equations and their determinant solutions can be derived from the discrete KP equation through Miwa transformation and some reductions. Then, by scrutinizing the reduction process, we obtain a set of semi-discrete bilinear equations and their general soliton solutions in the Gram-type determinant form. Finally, we obtain an integrable semi-discrete analog of the mCH equation by introducing dependent variables and a discrete reciprocal transformation. It is also shown that the semi-discrete mCH equation converges to the continuous one in the continuum limit.