Construction of constant scalar curvature Kahler cone metrics

Over a compact Kahler manifold, we provide a Fredholm alternative result for the Lichnerowicz operator associated to a Kahler metric with conic singularities along a divisor. We deduce several existence results of constant scalar curvature Kahler metrics with conic singularities: existence result under small deformations of Kahler classes, existence result over a Fano manifold, existence result over certain ruled manifolds. In this last case, we consider the projectivization of a parabolic stable holomorphic bundle. This leads us to prove that the existing Hermitian-Einstein metric on this bundle enjoys a regularity property along the divisor on the base.