报告题目:Recollements associated to cotorsion pairs over upper triangular matrix rings
报 告 人:丁南庆教授 南京大学数学系
报告时间:2020年8月10日 14:00-15:00
报告地点:腾讯会议 ID:408 422 052
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校内联系人:孙晓松 sunxs@jlu.edu.cn
报告摘要:
Let A, B be two rings, M be an A-B bimodule, and T be an upper triangular matrix with A, B in diagonal and M in the upper-right corner. Suppose that we are given two complete hereditary cotorsion pairs in A-Mod and B-Mod respectively. We define two cotorsion pairs and in T-Mod and show that both of them are complete and hereditary. If we are given two cofibrantly generated model structures $\mathcal{M}_A$ and $\mathcal{M}_B$ on A-Mod and B-Mod respectively, then using the result above, we investigate when there exists a cofibrantly generated model structure $\mathcal{M}_T$ on T-Mod and a recollement of $Ho(\mathcal{M}_T)$ relative to $Ho(\mathcal{M}_A)$ and $Ho(\mathcal{M}_B)$. Finally, some applications are given in Gorenstein homological algebra. This talk is a report on joint work with R.M. Zhu and Y.Y. Peng.
报告人简介:
丁南庆,南京大学数学系教授,博士生导师。先后获江苏省和国家教委科技进步奖、首届宝钢教育基金优秀教师奖、江苏省第四届青年科技奖、第五届霍英东青年教师奖二等奖、江苏省教学成果二等奖、中国高校科学技术奖励自然科学二等奖等多个奖项。主要研究领域是同调代数、环论、模论等。主持完成多项国家自然科学基金及博士点基金项目,在国内外重要学术刊物上发表论文100余篇。