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Approximation of higher-order powers of the spectral fractional Laplacian via polyharmonic extension

Published 6 Mar 2026 in math.NA | (2603.06945v1)

Abstract: We use the polyharmonic extension approach to develop a numerical technique for discretizing higher-order powers of the spectral fractional Laplacian $(-Δ)s$ with $s \in (1,2)$.

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