An inequality for bi-orthogonal pairs.
Spherical functions and spectral synthesis
Unbounded Lebesgue Constants on Compact Groups.
A.e. convergence of spectral sums on Lie groups
Let be a right-invariant sub-Laplacian on a connected Lie group and let denote the associated “spherical partial sums,” where is the spectral resolution of We prove that converges a.e. to as under the assumption
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