Convexity of the K-energy on the space of Kähler metrics and uniqueness of extremal metrics

• We establish the convexity of Mabuchi's K-energy functional along weak geodesics in the space of Kähler potentials on a compact Kähler manifold, thus confirming a conjecture of Chen, and give some applications in Kähler geometry, including a proof of the uniqueness of constant scalar curvature metrics (or more generally extremal metrics) modulo automorphisms. The key ingredient is a new local positivity property of weak solutions to the homogeneous Monge-Ampère equation on a product domain, whose proof uses plurisubharmonic variation of Bergman kernels.

Ämnesord

NATURVETENSKAP  -- Matematik (hsv//swe)

NATURAL SCIENCES  -- Mathematics (hsv//eng)

Nyckelord

scalar curvature

monge-ampere

projective embeddings

einstein metrics

ricci solitons

manifolds

geometry

stability

existence

geodesics

Plurisubharmonic function

Publikations- och innehållstyp

ref (ämneskategori)

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