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Sharp stability for Sobolev and log-Sobolev inequalities, with optimal dimensional dependence

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arxiv 2209.08651 v5 pith:LNM46APH submitted 2022-09-18 math.AP math.CAmath.FA

classification math.APmath.CAmath.FA
keywords optimalsobolevstabilityconstantsexplicitinequalitylog-sobolevquantitative
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We prove a sharp quantitative version for the stability of the Sobolev inequality with explicit constants. Moreover, the constants have the correct behavior in the limit of large dimensions, which allows us to deduce an optimal quantitative stability estimate for the Gaussian log-Sobolev inequality with an explicit dimension-free constant. Our proofs rely on several ingredients such as competing symmetries, a flow based on continuous Steiner symmetrization that interpolates continuously between a function and its symmetric decreasing rearrangement, and refined estimates on the Sobolev functional in the neighborhood of the optimal Aubin--Talenti functions.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The sharp $\sigma_2$-curvature inequality on the sphere in quantitative form

    math.AP 2024-12 accept novelty 8.0 of 10

    Near-minimizers of the normalized total σ2-curvature on the d-sphere are quantitatively close to the standard metric in two Sobolev norms, with optimal exponents 2 and 4.

  2. An overview of the stability of Sobolev inequalities on Riemannian manifolds with Ricci lower bounds

    math.AP 2024-12 accept novelty 2.0 of 10

    The paper reviews and re-exposes existing stability theorems for sharp Sobolev inequalities on manifolds with Ricci lower bounds.

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