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A simple Wilson orthonormal basis with exponential decay. (English) Zbl 0754.46016

MSC:
46C05 Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product)
81R10 Infinite-dimensional groups and algebras motivated by physics, including Virasoro, Kac-Moody, \(W\)-algebras and other current algebras and their representations
42C20 Other transformations of harmonic type
94A11 Application of orthogonal and other special functions
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