preprint

Inserted: 6 oct 2026
Last Updated: 6 oct 2026

Year: 2026

Abstract:

We establish the optimal stability of Dirichlet boundary value problem for the regional (fractional) $p$-Laplacian $(-Δ)^s_{p,Ω}$ with $0<s\leq 1$, $\frac{1}{s}<p<\infty$ and $Ω\subset \mathbb{R}^d$ bounded Lipschitz. More precisely, if $u_s \in W^{s,p}(Ω)$ satisfies $(-Δ)^s_{p,Ω} u_s = f_s$ in $Ω$ and $u_s = g_s$ on $\partial Ω$, then under appropriate condition on the date $f_s$ and $g_s$ we show that $\
u_s - u_1\
_{W^{s,p}(Ω)} \to 0 \quad \text{as } s \to 1^-.$ We also obtain an analogous optimal stability of the normalized Dirichlet eigenpairs $(λ_s,\varphi_s)$ associated with $(-Δ)^s_{p,Ω}$.