English

Strict positivity of K\"ahler-Einstein currents

Complex Variables 2023-06-01 v2 Algebraic Geometry Differential Geometry

Abstract

K\"ahler-Einstein currents, also known as singular K\"ahler-Einstein metrics, have been introduced and constructed a little over a decade ago. These currents live on mildly singular compact K\"ahler spaces XX and their two defining properties are the following: they are genuine K\"ahler-Einstein metrics on XregX_{\rm reg} and they admit local bounded potentials near the singularities of XX. In this note we show that these currents dominate a K\"ahler form near the singular locus, when either XX admits a global smoothing, or when XX has isolated smoothable singularities. Our results apply to klt pairs and allow us to show that if XX is any compact K\"ahler space of dimension 33 with log terminal singularities, then any singular K\"ahler-Einstein metric of non-positive curvature dominates a K\"ahler form.

Keywords

Cite

@article{arxiv.2305.12422,
  title  = {Strict positivity of K\"ahler-Einstein currents},
  author = {Vincent Guedj and Henri Guenancia and Ahmed Zeriahi},
  journal= {arXiv preprint arXiv:2305.12422},
  year   = {2023}
}

Comments

41 pages, v2: expanded section 1.3

R2 v1 2026-06-28T10:40:26.899Z