报告人:刘剑
报告地点:人民大街校区数学与统计学院515
报告时间:2026年10月24日星期六 11:00-12:00
邀请人:扶先辉
报告摘要:
We introduce gemstones in a pretriangulated category, which are used to perturb pretriangulated structures. For a triangulated category T whose stable category of coherent functors admits a gemstone, we construct pretriangulated structures on T which fail the octahedral axiom (TR4). This confirms a long-standing conjecture on triangulated categories. This is a joint work with Xiao-Wu Chen, Sergei O. Ivanov, Xue-Song Lu, Vladimir Sosnilo, and Chencheng Zhang.
主讲人简介:
刘剑,2016年本科毕业于东北师范大学数学与统计学院,博士毕业于中国科学技术大学,现为华中师范大学数学与统计学院副研究员,主要研究领域为交换代数及三角范畴相关理论,目前已在J. London Math. Soc., Nagoya Math. J,Pacific J. Math, Proc. Amer. Math. Soc.,Algebr. Represent. Theory等杂志发表论文多篇。