Families of conic K\"ahler-Einstein metrics

TL;DR

This paper proves that fiberwise conic K"ahler-Einstein metrics on a fibration of compact K"ahler manifolds induce a positive current on the total space, extending across divisors under certain ampleness conditions.

Contribution

It establishes the positivity and extendability of a current constructed from fiberwise conic K"ahler-Einstein metrics in a family of K"ahler manifolds with divisors.

Findings

The current from fiberwise metrics is positive.

The current extends across divisors.

The current is bounded outside the divisor.

Abstract

Let $p:X\to Y$ be an holomorphic surjective map between compact K\"ahler manifolds and let $D$ be an effective divisor on $X$ with generically simple normal crossings support and coefficients in $(0,1)$. Provided that the adjoint canonical bundle $K_{X_y}+D_y$ of the generic fiber is ample, we show that the current obtained by glueing the fiberwise conic K\"ahler-Einstein metrics on the regular locus of the fibration is positive. Moreover, we prove that this current is bounded outside the divisor and that it extends to a positive current on $X$.