Some curvature estimates of Kähler-Ricci flow

Man Chun Lee, Luen Fai Tam

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In this worK, first we will obtain some local curvature estimates for Kähler-Ricci flow on Kähler manifolds with initial metrics of nonnegative bisectional curvature. As a corollary, we prove that if g(t) is a complete solution of the Kähler Ricci flow which satisfies |Rm(g(t))| ≤ at−θ for some 0 < θ < 2, a > 0 and g(0) has nonnegative bisectional curvature, then g(t) also has nonnegative bisectional curvature. This generalizes results in [Amer. J. Math. 140 (2018), pp. 189–220] and [J. Differential Geom. 45 (1997), pp. 94–220]. Using the local curvature estimate, we prove that for a complete solution g(t) of the Kähler-Ricci flow with g(0) to have nonnegative bisectional curvature, to be noncollapsing, and supM×[τ,T] |Rm(g(t))| < +∞ for all τ > 0, then the curvature of g(t) is in fact bounded by at−1 for some a > 0. In particular, g(t) has nonnegative bisectional curvature for t > 0. This result is similar to a result by Simon and Topping in the Kähler category.

Original languageEnglish (US)
Pages (from-to)2641-2654
Number of pages14
JournalProceedings of the American Mathematical Society
Issue number6
StatePublished - 2019


  • Holomorphic bisectional curvature
  • Kähler manifold
  • Kähler-Ricci flow
  • Uniformization

ASJC Scopus subject areas

  • General Mathematics
  • Applied Mathematics


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