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Uniqueness of stationary states for singular Keller-Segel type models

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arxiv 1905.07788 v3 pith:UFTLSZ5G submitted 2019-05-19 math.AP

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keywords statesstationarytypeuniquenessgeneralisedinteractionkeller-segelradial
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We consider a generalised Keller-Segel model with non-linear porous medium type diffusion and non-local attractive power law interaction, focusing on potentials that are more singular than Newtonian interaction. We show uniqueness of stationary states (if they exist) in any dimension both in the diffusion-dominated regime and in the fair-competition regime when attraction and repulsion are in balance. As stationary states are radially symmetric decreasing, the question of uniqueness reduces to the radial setting. Our key result is a sharp generalised Hardy-Littlewood-Sobolev type functional inequality in the radial setting.

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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. Uniqueness and non-uniqueness of steady states of aggregation-diffusion equations

    math.AP 2019-08 accept novelty 8.0 of 10

    For aggregation-diffusion equations with attractive potentials, this paper proves steady states of fixed mass are unique iff m >= 2, and constructs non-uniqueness examples for 1 < m < 2.

  2. Equilibria of aggregation-diffusion models with nonlinear potentials

    math.AP 2025-08 accept novelty 7.0 of 10

    For aggregation-diffusion equations with nonlinear (s,p) Riesz potentials, radial stationary states coincide (up to scaling) with extremals of a Hardy-Littlewood-Sobolev inequality, and as s tends to 0 they converge t...

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