Volume 297, Issue 9 pp. 3439-3469
ORIGINAL ARTICLE

Single-peak solution for a fractional slightly subcritical problem with non-power nonlinearity

Shengbing Deng

Corresponding Author

Shengbing Deng

School of Mathematics and Statistics, Southwest University, Chongqing, People's Republic of China

Correspondence

Shengbing Deng, School of Mathematics and Statistics, Southwest University, Chongqing 400715, People's Republic of China.

Email: [email protected]

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Fang Yu

Fang Yu

School of Mathematics and Statistics, Southwest University, Chongqing, People's Republic of China

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First published: 30 June 2024

Abstract

We consider the following fractional problem involving slightly subcritical non-power nonlinearity,

( Δ ) s u = | u | 2 s 2 u [ ln ( e + | u | ) ] ε in Ω , [ 2 m m ] u = 0 on Ω , $$\begin{equation*} {\hspace*{60pt}\left\lbrace \def\eqcellsep{&}\begin{array}{lll}(-\Delta)^s u =\frac{|u|^{2_s^*-2}u}{[\ln (e+|u|)]^\epsilon }\ \ &{\rm in}\ \Omega, [2mm] u= 0 \ \ & {\rm on}\ \partial \Omega, \end{array} \right.} \end{equation*}$$
where Ω $\Omega$ is a smooth bounded domain in R n $\mathbb {R}^n$ , n 2 s + 1 $n\ge 2s+1$ , s ( 1 2 , 1 ) $s\in (\frac{1}{2},1)$ , 2 s = 2 n n 2 s $2_s^*=\frac{2n}{n-2s}$ is the fractional critical Sobolev exponent and ε > 0 $\epsilon >0$ is a small parameter, ( Δ ) s $(-\Delta)^s$ is the spectral fractional Laplacian operator. We construct a positive bubbling solution, which concentrates at a nondegenerate critical point of the Robin function by Lyapunov–Schmidt reduction procedure.

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