Frames of exponentials: lower frame bounds for finite subfamilies and approximation of the inverse frame operator

摘要

We give lower frame bounds for finite subfamilies of a frame of exponentials {e(i lambdak(.))}k is an element ofZ in L-2(-pi,pi). We also present a method for approximation of the inverse frame operator corresponding to {e(i lambdak(.))}k is an element ofZ, where knowledge of the frame bounds for finite subfamilies is crucial. (C) 2001 Elsevier Science Inc. All rights reserved. [References: 17]