Our colleague and friend Cem Sayar will give a talk this coming Monday at 10.30am in DM409A. The work is joint with Tedi Draghici, the title and abstract are below.

Title: Some remarks on almost Hermitian functionals

Abstract

We study critical points of natural functionals on various spaces of almost Hermitian structures on a compact manifold M^2n. We present a general framework, introducing the notion of gradient of an almost Hermitian functional. As a consequence of the diffeomorphism invariance, we show that a Schur's type theorem still holds for general almost Hermitian functionals, generalizing a known fact for Riemannian functionals. We present two concrete examples, the Gauduchon's functional and a close relative of it. These functionals have been studied previously, but not in the most general setup as we do here, and we make some new observations about their critical points.