Abstract
Let Hn+1 denote the simply connected complete space of constant curvature −1. The Laplacian Δ, acting on square integrable p-forms of H, is identified up to unitary equivalence.
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Donnelly, H. The differential form spectrum of hyperbolic space. Manuscripta Math 33, 365–385 (1981). https://doi.org/10.1007/BF01798234
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DOI: https://doi.org/10.1007/BF01798234