November 29, 2021
Seminar title: On the Tjurina number of projective plane curves
Speaker: Prof. Alexandru Dimca, Université Nice-Sophia Antipolis, France
Date: Monday, November 29, 2021
Time: 4:00- 5:00 pm
A. du Plessis and C.T.C. Wall have obtained lower and upper bounds for the Tjurina number of projective plane curves. In some cases, the curves having maximal Tjurina numbers are exactly the free curves. In the talk we will survey various new results in this area, as well as a number of open problems. The case of line arrangements is very interesting and will be given special attention. One of the open problems is a stronger form of K. Saito’s Conjecture, saying that the freeness of a line arrangement is determined by the combinatorics.
The seminar will be held on Zoom at this link: