Seminário de Análise - sexta-feira 10/11, às 10h30 (2) O seminário ocorrerá no próximo dia 10/11, às 10h30, no auditório do MAT Details Published: Thursday, November 09 2023 10:00 Título: The epidemic mathematical models and the spatial-temporal risk index Palestrante: Zhigui Lin Yangzhou University-China Abstract.: In this talk, a diffusion SIS model is proposed to study the spatial spreading of virus. The free boundary is introduced to describe the spreading front of the infected interval. To check the effect of spatial heterogeneity and habitat characteristic on the spreading of the virus, the basic reproduction number RN0 and the spatial-temporal risk index RF0 (t) are given for the model in a bounded environment with no flux and in a expanding environment, respectively. Our results show that the virus will spread in the high-risk habitat; In a low-risk habitat, small initial infected habitat, small initial numbers of the virus and fast diffusion are beneficial for the virus to vanish. When the virus spreads in the whole habitat, the asymptotic spreading speed is given. Últimas Notícias Seminário de Pesquisa e Educação Matemática - 27/06/2025 "Studying and developing mathematics teaching through research: two approaches from Europe" Seminário de Análise - 27/06/2025 às 10:30 O seminário ocorrerá no próximo dia 27/06, às 10h30, no auditório do MAT I Ciclo de Palestras do PIBID Matemática UnB O evento ocorrerá de 30/06 à 04/07, sempre às 18h. Seminário de Álgebra - 27/07/2025 O seminário ocorrerá no próximo dia 27/06, às 14h30, no auditório do MAT