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This article by Juan Miguel Medina, Bruno Cernuschi-Frías examines the density of certain families of functions in L²(µ), providing a review of wide-sense stationary processes, LTI operations, multichannel sampling problems, stability frames, spectral conditions, completeness, framesequences, and useful operators such as projections and periodizations.
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Density of certain families of functions in L²(µ) Juan Miguel Medina Bruno Cernuschi-Frías IAM-CONICET y Universidad de Buenos Aires
SpectralConditionsforMultichannelSampling.Completeness and framesequences