## Noncommutative Geometry Seminar

Date: January 21, 2022

Time: 09:15AM - 10:00AM

Location: ZOOM

Speaker: Rudolph Zeidler

Title: Scalar and mean curvature comparison via the Dirac operator

Abstract: Abstract: I will explain a spinorial approach towards a comparison and rigidity principle involving scalar and mean curvature for certain warped products over intervals. This is motivated by recent scalar curvature comparison questions of Gromov, in particular distance estimates under lower scalar curvature bounds on Riemannian bands $M \times [-1,1]$ and Cecchini's long neck principle. I will also exhibit applications of these techniques in the context of the positive mass theorem with arbitrary ends. This talk is based on joint work with Simone Cecchini.