The title of the second talk will be: The Kaehler hermitian scalar
curvature as a momentum map (I gave a similar talk in Osaka in
October 2005).

Abstract: The riemannian scalar curvature of a Kaehler metric --- more generally, the hermitian scalar curvature of an almost-Kaehler metric--- can be interpreted as a momentum map in the space of all (almost) complex structures compatible with a fixed symplectic form relatively to the action ofthe group of (hamiltonian) symplectomorphisms. This fact --- first observed by A. Fujiki in the integrable (Kaehler) case and by S. K. Donaldson in the general almost-Kaehler case --- can be deduced from the interpretation of the (modified) Mabuchi energy as a Kaehler potential.