Wed, August 30, 2017
Public Access Category: All |
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- Time:
- 11:00am
- Location:
- Ramanujan Hall
- Description:
- Speaker: Venkitesh S.I. (IITB)
Title: The Szemeredi-Trotter Theorem
Abstract:
Given a finite set of points P in R^2 and a finite family of lines L
in R^2, an incidence is a pair (p,l), where p\in P, l\in L and p is a
point in l.
The Szemeredi-Trotter Theorem states that the number of incidences is
atmost a constant multiple of (|L||P|)^{2/3} + |L| + |P|. We give a
proof by Tao, which uses the method of cell partitions.
- Time:
- 4:00pm-5:00pm
- Location:
- Ramanujan Hall
- Description:
- Speaker: Prof. Eknath Ghate (TIFR)
Title: Reductions of Galois Representations: Act 1.5
Abstract: We shall describe recent progress on the question of writing
down the reductions of certain local Galois representations. We shall
focus on the case of half integral slopes (especially slope 3/2)
where the behaviour of the reduction is both more complicated and
more interesting.
Our proof uses the mod p Local Langlands Correspondence to reduce the
problem to computing the reductions of certain locally algebraic
representations of GL_2 of the p-adics on certain functions on
the underlying tree.