Concentration from Geometry in High Dimension: part 2

Series: 
High Dimensional Seminar
Wednesday, September 12, 2018 - 12:55pm
1 hour (actually 50 minutes)
Location: 
Skiles 006
,  
Georgia Institute of technology
,  
Organizer: 
The concentration of Lipschitz functions around their expectation is a classical topic and continues to be very active. In these talks, we will discuss some recent progress in detail, including:  A tight log-Sobolev inequality for isotropic logconcave densities A unified and improved large deviation inequality for convex bodies An extension of the above to Lipschitz functions (generalizing the Euclidean squared distance)The main technique of proof is a simple iteration (equivalently, a Martingale process) that gradually transforms any density into one with a Gaussian factor, for which isoperimetric inequalities are considerably easier to establish.  (Warning: the talk will involve elementary calculus on the board, sometimes at an excruciatingly slow pace).   Joint work with Yin Tat Lee.