Naoto Yotsutani, Bott Manifolds with the Strong Calabi Dream Structure

We prove that if the Futaki invariant of a polarized Bott manifold (X, L) for any ample line bundle L vanishes, then X is isomorphic to the products of the projective lines. This talk is based on a work joint with Kento Fujita (algebro-geometrical approach), and another independent work joint with Hajime Ono and Yuji Sano (convex geometrical approach).