Virtual commutative algebra seminar Speaker: Xianglong Ni, University of California, Berkeley, CA, USA Date/Time: 28 October 2022, 6:30pm IST/ 1:00pm GMT /9:00am ET (joining time 6:20 pm IST) Gmeet link: meet.google.com/ngr-tekr-vfb [1] Title: Linkage in codimension three Abstract: All perfect ideals of codimension two are in the linkage class of a complete intersection (licci), but in codimension three and beyond this is no longer the case. I will share some ongoing work, joint with Lorenzo Guerrieri and Jerzy Weyman, which illustrates how the theory of "higher structure maps" originating from Weyman's generic ring may be used to distinguish licci ideals within the broader class of perfect ideals of codimension three. For more information and links to previous seminars, visit the website of VCAS: https://sites.google.com/view/virtual-comm-algebra-seminar [2]