# Construction of constant scalar curvature K\"ahler cone metrics

## TL;DR

This paper establishes existence results for constant scalar curvature K"ahler cone metrics on compact K"ahler manifolds with conic singularities, using a Fredholm alternative for the Lichnerowicz operator.

## Contribution

It introduces a Fredholm alternative framework for the Lichnerowicz operator in conic settings and proves new existence results for K"ahler cone metrics under various conditions.

## Key findings

- Existence of constant scalar curvature K"ahler cone metrics under small deformations.
- Existence of such metrics on Fano manifolds.
- Regularity of Hermitian-Einstein metrics on projectivised stable bundles.

## Abstract

Over a compact K\"ahler manifold, we provide a Fredholm alternative result for the Lichnerowicz operator associated to a K\"ahler metric with conic singularities along a divisor. We deduce several existence results of constant scalar curvature K\"ahler metrics with conic singularities: existence result under small deformations of K\"ahler classes, existence result over a Fano manifold, existence result over certain ruled manifolds. In this last case, we consider the projectivisation 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.