讲座人简介：惠昌常，代数学专家，博士生导师，首都师范大学特聘教授。在代数表示论及相关方面做出了重要贡献。1989年在联邦德国Bielefeld大学获博士学位，导师是国际著名代数表示论专家Claus Michael Ringel教授。曾在德国、英国、日本、美国、香港、等10多个国家和地区进行学术访问或合作科研。曾获教育部科技进步二等奖、德国“年轻杰出学者洪堡奖”。主持有国家自然科学基金重点项目等。担任《J. Algebra》、《Archiv der Math.》、《Asia-Euro. J. Math.》、《J. Math. Research Appl.》等国际期刊的编委。

讲座简介：We study Tachikawa's second conjecture for symmetric algebras. This is processed by mirror reflection of left (or right) ideals generated by idempotent elements. In this way, The conjecture is reformulated in terms of recollements of derived categories of algebras which are both higher dimensional Auslander-Gorenstein algebras and higher dominant-dimensional gendo-symmetric algebras. The content of the talk is from joint work with H. X. Chen and M. Fang.