Abstract
In this paper, we first determine the relations among the best bounds A and B of the g-frame, the g-frame operator S and the pre-frame operator Q and give a necessary and sufficient condition for a g-frame with bounds A and B in a complex Hilbert space. We also introduce the definition of a g-frame sequence and obtain a necessary and sufficient condition for a g-frame sequence with bounds A and B in a complex Hilbert space. Lastly, we consider the stability of a g-frame sequence for a complex Hilbert space under perturbation.
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Partly supported by Natural Science Foundation of Fujian Province of China (No. 2009J01007) and Education Commission Foundation of Fujian Province of China (No. JA08013)
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Wang, Y.J., Zhu, Y.C. G-frames and g-frame sequences in Hilbert spaces. Acta. Math. Sin.-English Ser. 25, 2093–2106 (2009). https://doi.org/10.1007/s10114-009-7615-8
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DOI: https://doi.org/10.1007/s10114-009-7615-8