Document Type : Research Paper
Author
Department of mathematics, University of Maragheh, Maragheh, Iran.
Abstract
Motivating the perturbations of frames in Hilbert and Banach spaces, in this paper we introduce the invariance of Fr'echet frames under perturbation. Also we show that for any Fr'echet spaces, there is a Fr'echet frame and any element in these spaces has a series expansion.
Keywords
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