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math.FA2024
Local spectral density and Slepian concentration for spherical Fourier-Bessel truncation spaces
Xinpeng Huang
We study diagonal kernel asymptotics and concentration spectra for a family of non-translation-invariant spectral projections in , . The projections are obta…
math.FA2023
Spatiospectral localization within the ball -- studies on the influence of the spectral shape
Christian Gerhards, Xinpeng Huang
We investigate the Slepian spatiospectral localization problem within subdomains of the -dimensional ball. Opposed to the more classical setups of the Euclidean space or the sph…