广州数学大讲坛第十五期
第一百四十九讲——武汉大学江宁教授学术报告
题目:Grad-Caflisch type decay estimates of pseudo-inverse of linearized Boltzmann operator and application to Hilbert expansion of compressible Euler scaling
时间:2022年11月25号(周五)上午9:00 -10:00
地点: 腾讯会议(会议号ID:808-716-020 )
报告人:江宁 教授
摘要: we prove some Grad-Caflisch type decay estimates of the pseudo-inverse of linearized Boltzmann collision operator, including both the hard potential( ) and part of soft ( ) potential cutoff interaction kernels. The key idea is that the weighted -norms of are first dominated by the weighted -norms of , and then the -norms are bounded by the -norms of via the hypocoercivity of the weighted operator . The proof of the weighted hypocoercivity employs the high-low velocities estimates argument. Finally, these decay estimates are further applied to derive some new point-wise estimates for the Hilbert expansion terms of the Boltzmann equation in the compressible Euler scaling.
报告人简介:
江宁,武汉大学数学与统计学院教授,博士生导师。本科毕业于南京大学数学系,硕士毕业于中国科学院数学所(导师为丁伟岳院士),博士毕业于美国马里兰大学(导师为C. D. Levermore教授)。2006-2010年在纽约大学Courant研究所任Courant讲师,2010-2015年在清华大学数学科学中心任教,2015年至今任武汉大学数学与统计学院教授。 江宁教授的研究方向为非线性偏微分方程和几何分析, 相关成果发表在CPAM, ARMA等国际著名期刊杂志上。