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Characterization of the weighted Sobolev space $H_{\beta}^{s}(\Omega)$ in $\mathbb{R}^{2}$ in terms of the decay rate of Fourier-Jacobi coefficients
V. J. Ervin
https://arxiv.org/abs/2404.04658

Characterization of the weighted Sobolev space $H_β^{s}(Ω)$ in $\mathbb{R}^{2}$ in terms of the decay rate of Fourier-Jacobi coefficients
In this paper, motivated by the analysis of the fractional Laplace equation on the unit disk in $\mathbb{R}^{2}$, we establish a characterization of the weighted Sobolev space $H_β^{s}(Ω)$ in terms of the decay rate of Fourier-Jacobi coefficients. This framework is then used to give a precise analysis of the solution to the fractional Laplace equation on the unit disk.