Abstract

We study the evolution of pluri-anticanonical line bundles $K\_M^{-\nu}$ along the Kähler Ricci flow on a Fano manifold $M$. Under some special conditions, we show that the convergence of this flow is determined by the properties of the pluri-anticanonical divisors of $M$. For example, the Kähler Ricci flow on $M$ converges when $M$ is a Fano surface satisfying $c\_1^2(M)=1$ or $c\_1^2(M)=3$. Combined with the works in \[CW1] and \[CW2], this gives a Ricci flow proof of the Calabi conjecture on Fano surfaces with reductive automorphism groups. The original proof of this conjecture is due to Gang Tian in \[Tian90].

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