paper

Immortal homogeneous Ricci flows

arXiv:1701.00628 · doi:10.1007/s00222-017-0771-z

Abstract

We show that for an immortal homogeneous Ricci flow solution any sequence of parabolic blow-downs subconverges to a homogeneous expanding Ricci soliton. This is established by constructing a new Lyapunov function based on curvature estimates which come from real geometric invariant theory.

Final version, to appear in Invent. Math

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