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G-uniform stability and K\"{a}hler-Einstein metrics on Fano varieties

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arxiv 1907.09399 v6 pith:ZPTEW6IK submitted 2019-07-22 math.DG math.AGmath.CV

classification math.DGmath.AGmath.CV
keywords mathbbfanomathrmhler-einsteinvarietiesadmitsarbitraryautomorphism
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abstract

Let $X$ be any $\mathbb{Q}$-Fano variety and $\mathrm{Aut}(X)_0$ be the identity component of the automorphism group of $X$. Let $\mathbb{G}$ be a connected reductive subgroup of $\mathrm{Aut}(X)_0$ that contains a maximal torus of $\mathrm{Aut}(X)_0$. We prove that $X$ admits a K\"{a}hler-Einstein metric if and only if $X$ is $\mathbb{G}$-uniformly K-stable. This proves a version of Yau-Tian-Donaldson conjecture for arbitrary singular Fano varieties. A key new ingredient is a valuative criterion for $\mathbb{G}$-uniform K-stability.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Relative Ding Stability and an Obstruction to the Existence of Mabuchi Solitons

    math.DG 2019-08 conditional novelty 7.0 of 10

    Uniform relative Ding stability of a Fano manifold implies the necessary numerical condition ϑ(M) < 1 for the existence of Mabuchi solitons.

  2. Existence of Kahler-Ricci solitons on smoothable Q-Fano varities

    math.DG 2019-08 conditional novelty 6.0 of 10

    K-stable smoothable Q-Fano varieties admit Kähler-Ricci solitons, extending the Yau-Tian-Donaldson correspondence for solitons from the smooth case to the singular smoothable case.

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