Sharp results on sampling with derivatives in shift-invariant spaces and multi-window Gabor frames (1712.07899v2)

Published 21 Dec 2017 in math.CA

Abstract: We study the problem of sampling with derivatives in shift-invariant spaces generated by totally-positive functions of Gaussian type or by the hyperbolic secant. We provide sharp conditions in terms of weighted Beurling densities. As a by-product we derive new results about multi-window Gabor frames with respect to vectors of Hermite functions or totally positive functions.

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