报告时间：2022年04月26日（星期二）15:00-16:00

报告地点：腾讯会议：845601604

报 告 人：虞国富 教授

工作单位：上海交通大学

举办单位：数学学院

报告简介：

In this talk, we construct an 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. This is a joint work with Bao-Feng Feng and Han-Han Sheng.

报告人简介：

虞国富，2007年6月博士毕业于中国科学院数学与系统科学研究院; 加拿大蒙特利尔大学博士后。现为上海交通大学数学科学学院教授、博士生导师。主要从事孤立子与可积系统、特殊函数、正交多项式方面的研究。在国外重要学术刊物上发表SCI论文40余篇。主持国家自然科学基金、上海市晨光计划、上海交通大学晨星青年学者奖励计划等多项研究课题。