Thu, February 6, 2020
Public Access

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Category: All

06
February 2020
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11:00am [11:30am] Anand Sawant : School of Mathematics, TIFR
Description:
Algebraic Geometry seminar. Speaker: Anand Sawant. Affiliation: School of Mathematics, TIFR. Date and Time: Thursday 06 February, 11:30 am - 12:30 pm. Venue: Ramanujan Hall, Department of Mathematics. Title: Central extensions of algebraic groups, II. Abstract: This talk will be a continuation of the Colloquium talk last week, where we will begin wth the work of Brylinski-Deligne.

12:00pm
1:00pm  
2:00pm  
3:00pm  
4:00pm [4:00pm] Mrinmoy Datta : Arctic University of Norway, Tromso
Description:
Geometry and Topology seminar. Speaker: Mrinmoy Datta. Affiliation: Arctic University of Norway, Tromso. Date and Time: Thursday 06 February, 04:00 pm - 05:00 pm. Venue: Ramanujan Hall, Department of Mathematics. Title: Hermitian surfaces over finite fields and a conjecture by Sørensen. Abstract: Hermitian varieties, first studied by Bose and Chakravati in 1966, are a class of vastly studied objects in the area of finite geometry and coding theory. During 1991, in his PhD thesis, A. B. Sørensen proposed a conjecture on the maximum number of rational points on the intersection of a Hermitian surface and a surface of degree d defined over the same field. Edoukou's work in 2006 towards proving the conjecture for d=2 marked the first progress towards this conjecture. In 2018, in a joint work with Peter Beelen, we have shown that the conjecture is true for d=3. Finally, in a joint work with Peter Beelen and Masaaki Homma, we have proved the conjecture completely. In this talk, we will give an account of these developments.
5:00pm  
6:00pm