Calendar

I will present aspects of a theorem, joint with Mihalis Dafermos, Gustav Holzegel and Igor Rodnianski, on the full finite codimension nonlinear asymptotic stability of the Schwarzschild family of black holes.

March 29 – April 1, 2022: 10:00am – 12:00pm ET, each day

Location: Hybrid. CMSA main seminar room, G-10. Zoom link will be available.

All in-person attendees must register online.

For more information, please see https://cmsa.fas.harvard.edu/gr-program/

Matroids are combinatorial abstractions of vector spaces embedded in a coordinate space.  Many fundamental questions have been open for these classical objects.  We highlight some recent progress that arise from the interaction between matroid theory and algebraic geometry.  Key objects involve compactifications of embedded vector spaces, and an exceptional Hirzebruch-Riemann-Roch isomorphism between the K-ring of vector bundles and the cohomology ring of stellahedral varieties.

For information on how to join, please see:  https://cmsa.fas.harvard.edu/seminars-and-colloquium/

I will first explain the significance of Thurston’s pushforward operator for studying postcritically finite rational maps. I will then present some results due to Buff-Epstein-Koch which relate the eigenvalues of this operator to the multipliers of a rational map and also describe the set of eigenvalues of all unicritical polynomials of a given degree.