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Multipliers of spherical harmonics and energy of measures on the sphere
Authors:Kathryn E Hare  Maria Roginskaya
Institution:1.Department of Pure Mathematics,University of Waterloo,Waterloo,Canada;2.Department of Mathematics,Chalmers Institute of Technology,G?teborg,Sweden
Abstract:We consider the operator,f(Δ) for Δ the Laplacian, on spaces of measures on the sphere inR d , show how to determine a family of approximating kernels for this operator assuming that certain technical conditions are satisfied, and give estimates for theL2-norm off(Δ)μ in terms of the energy of the measure μ. We derive a formula, analogous to the classical formula relating the energy of a measure onR d with its Fourier transform, comparing the energy of a measure on the sphere with the size of its spherical harmonics. An application is given to pluriharmonic measures.
Keywords:
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