0000000000275799

AUTHOR

Alessio Figalli

0000-0003-4182-5343

showing 2 related works from this author

A Quantitative Analysis of Metrics on Rn with Almost Constant Positive Scalar Curvature, with Applications to Fast Diffusion Flows

2017

We prove a quantitative structure theorem for metrics on $\mathbf{R}^n$ that are conformal to the flat metric, have almost constant positive scalar curvature, and cannot concentrate more than one bubble. As an application of our result, we show a quantitative rate of convergence in relative entropy for a fast diffusion equation in $\mathbf{R}^n$ related to the Yamabe flow.

General MathematicsYamabe flow010102 general mathematicsMathematical analysisMetric Geometry (math.MG)01 natural sciencesMathematics - Analysis of PDEsMathematics - Metric Geometry0103 physical sciencesFOS: Mathematics010307 mathematical physics0101 mathematicsDiffusion (business)Constant (mathematics)Quantitative analysis Yamabe flow fast diffusion flowQuantitative analysis (chemistry)Analysis of PDEs (math.AP)MathematicsScalar curvature
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Rigidity and sharp stability estimates for hypersurfaces with constant and almost-constant nonlocal mean curvature

2018

We prove that the boundary of a (not necessarily connected) bounded smooth set with constant nonlocal mean curvature is a sphere. More generally, and in contrast with what happens in the classical case, we show that the Lipschitz constant of the nonlocal mean curvature of such a boundary controls its $C^2$-distance from a single sphere. The corresponding stability inequality is obtained with a sharp decay rate.

Mathematics - Differential GeometryMean curvatureApplied MathematicsGeneral Mathematics010102 general mathematicsMathematical analysis01 natural sciencesStability (probability)010101 applied mathematicsMathematics - Analysis of PDEsRigidity (electromagnetism)Differential Geometry (math.DG)Alexandrov Theorem Stability Nonlocal mean curvature fractional perimeterSettore MAT/05 - Analisi MatematicaFOS: MathematicsMathematics (all)0101 mathematicsConstant (mathematics)Mathematics (all); Applied MathematicsAnalysis of PDEs (math.AP)MathematicsJournal für die reine und angewandte Mathematik (Crelles Journal)
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