報告題目:Recollements associated to cotorsion pairs over upper triangular matrix rings
報 告 人:丁南慶教授 南京大學數學系
報告時間:2020年8月10日 14:00-15:00
報告地點:騰訊會議 ID:408 422 052
或點擊鍊接直接加入會議:https://meeting.tencent.com/s/xLYwJvVTEU0I
校内聯系人:孫曉松 sunxs@jlu.edu.cn
報告摘要:
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.
報告人簡介:
丁南慶,南京大學數學系教授,博士生導師。先後獲江蘇省和國家教委科技進步獎、首屆寶鋼教育基金優秀教師獎、江蘇省第四屆青年科技獎、第五屆霍英東青年教師獎二等獎、江蘇省教學成果二等獎、中國高校科學技術獎勵自然科學二等獎等多個獎項。主要研究領域是同調代數、環論、模論等。主持完成多項國家自然科學基金及博士點基金項目,在國内外重要學術刊物上發表論文100餘篇。