Parabolic methods for ultraspherical interpolation inequalities
Parabolic methods for ultraspherical interpolation inequalities
复制标题
超球面插值不等式的抛物线方法
DOI:
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发表时间:
2022
期刊:
影响因子:
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通讯作者:
An Zhang
中科院分区:
文献类型:
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作者:
J. Dolbeault;An Zhang
The carré du champ method is a powerful technique for proving interpolation inequalities with explicit constants in presence of a non-trivial metric on a manifold. The method applies to some classical Gagliardo-Nirenberg-Sobolev inequalities on the sphere, with optimal constants. Very nonlinear regimes close to the critical Sobolev exponent can be covered using nonlinear parabolic flows of porous medium or fast diffusion type. Considering power law weights is a natural question in relation with symmetry breaking issues for Caffarelli-Kohn-Nirenberg inequalities, but regularity estimates for a complete justification of the computation are missing. We provide the first example of a complete parabolic proof based on a nonlinear flow by regularizing the singularity induced by the weight. Our result is established in the simplified framework of a diffusion built on the ultraspherical operator, which amounts to reduce the problem to functions on the sphere with simple symmetry properties.
DOI:
10.4171/aihpc/35
发表时间:
2023
期刊:
Analyse non linéaire
影响因子:
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作者:
Frank, Rupert L.
通讯作者:
Frank, Rupert L.