報告人:陳紅星 研究員
報告題目:Finiteness of homological dimensions in triangulated categories
報告時間:2026年4月29日(周三)下午4:30-5:20
報告地點:云龍校區6號樓304報告廳
主辦單位:數學與統計學院、數學研究院、科學技術研究院
報告人簡介:
陳紅星,男,首都師范大學數學科學學院研究員,德國洪堡訪問學者,博士畢業于北京師范大學。研究方向為代數表示論與同調代數,主要從事經典同調猜想、導出范疇、傾斜與粘合理論等方面的研究。研究成果發表在Proc. Lond. Math. Soc、Trans. Amer. Math. Soc、Int Math Res Notices等國際知名數學雜志。2018年度入選北京市科技新星計劃,并受邀在第18屆國際代數表示論會議上做大會報告。
報告摘要:
In a general triangulated category, the finiteness of the finitistic dimension serves as a prerequisite for a categorical obstruction, via the singularity category, to the existence of bounded t-structures. In this talk, we investigate the finitistic, big finitistic, and global dimensions, and establish explicit inequalities that relate these dimensions of the middle category in a recollement of triangulated categories to those of the outer categories. This provides a unified framework for extending some known results on the homological dimensions of ordinary rings to weakly approximable triangulated categories. This talk reports a joint work with Xiaohu Chen (CNU) and Jinbi Zhang (AHU).