Metrics with cone singularities along normal crossing divisors and holomorphic tensor fields

Campana, Frédéric; Guenancia, Henri; Păun, Mihai

Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 46 (2013) no. 6, pp. 879-916.

Dans cet article, nous prouvons l'existence de métriques de Kähler-Einstein à courbure négative ayant des singularités coniques le long d'un diviseur à croisements normaux simples sur une variété kählérienne compacte, sous une hypothèse technique sur les angles des cones. Nous discutons également du cas des métriques de Kähler-Einstein à courbure strictement positive avec des singularités coniques. Nous en déduisons que les résultats classiques de Lichnerowicz et Kobayashi sur le parallélisme et l'annulation des champs de tenseurs holomorphes s'étendent à notre cadre.

We prove the existence of non-positively curved Kähler-Einstein metrics with cone singularities along a given simple normal crossing divisor of a compact Kähler manifold, under a technical condition on the cone angles, and we also discuss the case of positively-curved Kähler-Einstein metrics with cone singularities. As an application we extend to this setting classical results of Lichnerowicz and Kobayashi on the parallelism and vanishing of appropriate holomorphic tensor fields.

Classification : 32Q05, 32Q10, 32Q15, 32Q20, 32U05, 32U15
Keywords: kähler-Einstein metrics, cone singularities, orbifold tensors, Monge-ampère equations
Mot clés : métriques de kähler-Einstein, singularités coniques, tenseurs orbifoldes, équation de Monge-ampère

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