The closure of the set of periodic modules over a concealed canonical algebra is regular in codimension one

[摘要] Let A be a concealed canonical algebra and d the dimension vector of a Lambda-module which is periodic respect to the action of the Auslander Reiten translation tau. In the paper, we investigate the union of the closures of the orbits of the tau-periodic Lambda-modules of dimension vector d. We show that this set is closed and regular in codimension one. (C) 2017 Elsevier Inc. All rights reserved.

[发布日期] 2017-12-15

[关键词] Concealed canonical algebra;Module variety;Regularity in codimension one;Periodic module