TY - JOUR

T1 - Maximal regularity and a singular limit problem for the Patlak–Keller–Segel system in the scaling critical space involving BMO

AU - Kurokiba, Masaki

AU - Ogawa, Takayoshi

N1 - Funding Information:
The (second) author would like to thank the anonymous referees for their advises and pointing out some irrational expression in the original manuscript. The work of M. Kurokiba is partially supported by JSPS Grant in aid for Scientific Research (C) #19K03555. The work of T. Ogawa is partially supported by JSPS Grant in aid for Scientific Research (S) #19H05597 and Challenging Research (Pioneering) #20K20284.
Publisher Copyright:
© 2021, The Author(s).

PY - 2022/2

Y1 - 2022/2

N2 - We consider a singular limit problem of the Cauchy problem for the Patlak–Keller–Segel equation in a scaling critical function space. It is shown that a solution to the Patlak–Keller–Segel system in a scaling critical function space involving the class of bounded mean oscillations converges to a solution to the drift-diffusion system of parabolic-elliptic type (simplified Keller–Segel model) strongly as the relaxation time parameter τ→ ∞. For the proof, we show generalized maximal regularity for the heat equation in the homogeneous Besov spaces and the class of bounded mean oscillations and we utilize them systematically as well as the continuous embeddings between the interpolation spaces B˙q,σs(Rn) and F˙q,σs(Rn) for the proof of the singular limit. In particular, end-point maximal regularity in BMO and space time modified class introduced by Koch–Tataru is utilized in our proof.

AB - We consider a singular limit problem of the Cauchy problem for the Patlak–Keller–Segel equation in a scaling critical function space. It is shown that a solution to the Patlak–Keller–Segel system in a scaling critical function space involving the class of bounded mean oscillations converges to a solution to the drift-diffusion system of parabolic-elliptic type (simplified Keller–Segel model) strongly as the relaxation time parameter τ→ ∞. For the proof, we show generalized maximal regularity for the heat equation in the homogeneous Besov spaces and the class of bounded mean oscillations and we utilize them systematically as well as the continuous embeddings between the interpolation spaces B˙q,σs(Rn) and F˙q,σs(Rn) for the proof of the singular limit. In particular, end-point maximal regularity in BMO and space time modified class introduced by Koch–Tataru is utilized in our proof.

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U2 - 10.1007/s42985-021-00134-3

DO - 10.1007/s42985-021-00134-3

M3 - Article

AN - SCOPUS:85126337099

SN - 2662-2963

VL - 3

JO - Partial Differential Equations and Applications

JF - Partial Differential Equations and Applications

IS - 1

M1 - 3

ER -