Abstract
We consider translates of functions in $L^2(\RRd)$ along an irregular set of points. Introducing a notion of pseudo-Gramian function for the irregular case, we obtain conditions for a family of irregular translates to be a Bessel sequence or Riesz sequence. We find a representation of the canonical dual of a frame sequence $\{ϕ( \cdot - λ_k)\}_{k\in \ZZ}$ - where is a bandlimited function - in terms of its Fourier transform.
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