Colloquium
DATE	2024-03-14　16:10-17:00
PLACE	數學系館 1F3174教室
SPEAKER	陳俊全 教授（台灣大學數學系）
TITLE	Propagating Direction in the Two Species Lotka-Volterra Competition -Diffusion System
ABSTRACT	The sign of the traveling wave speed in the two species Lotka-Volterra competition-diffiusion system under strong competition provides important information about the competitive advan tage of the species. To study the sign problem of the speed, we propose a mini-max charac terization of the coefficients in the reaction terms when the wave speed is zero. Applying our characterization, some explicit conditions under which the speed sign can be determined are obtained.