成人色情

Dynamics of several modified Rosenzweig-MacArthur equations in constant and changing environments

活动时间:2025-09-13 10:00

活动地点:2号学院楼454会议室

主讲人:黄继才

主讲人中文简介:

黄继才,华中师范大学教授、博士生导师。2005年获中国科学院数学与系统科学研究院数学所博士学位。主要从事常微分方程定性理论、分岔理论及其应用研究。在 JDE、Nonlinearity、JDDE、Physica D、PRSE-A、SIAP、SIADS、JMB等期刊发表学术论文六十余篇。文章 (SIADS, 2019) 被选为该刊 Featured Article,并被美国工业与应用数学学会在其官方网站《SIAM News》上专文报道。曾获河南省自然科学奖二等奖、湖北省自然科学奖三等奖各1项。

活动内容摘要:

In this talk, we study dynamics of the modified Rosenzweig-MacArthur equation in constant and changing environments. We first provide a more easily verifiable classification to determine the types and codimension of nilpotent singularities in a general planar system. Second, by using some algebraic and symbolic computation methods, we show that the highest codimension of a nilpotent focus is 4 and the modified RM equation can exhibit nilpotent focus bifurcation of codimension 4. Finally, we give a brief introduction of three other modified Rosenzweig-MacArthur equations.

主持人:吴潇