8 apr 2021 -- 14:30
Firenze (online)
Seminario di Geometria Differenziale e Analisi Complessa del Dipartimento di Matematica e Informatica "Ulisse Dini" dell'Università di Firenze
Abstract.
After some quick preliminaries on the general stability theory of compact Einstein manifolds, we will focus on the homogeneous case and give a formula for the Lichnerowicz Laplacian of a G-invariant metric on a compact homogeneous space $M=G/K$, restricted to the subspace of G-invariant TT-tensors, which was obtained via the moving bracket approach.
As an application, we study the stability type of G-invariant Einstein metrics on M, which are known to be the critical points of the scalar curvature restricted to unit volume G-invariant metrics. The naturally reductive case presents some advantages.
This is joint work with Cynthia Will and Emilio Lauret.