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math.FA2023
Weighted frames, weighted lower semi frames and unconditionally convergent multipliers
Peter Balazs, Rosario Corso, Diana Stoeva
In this paper we ask when it is possible to transform a given sequence into a frame or a lower semi frame by multiplying the elements by numbers. In other words, we ask when a give…
math.FA2023
Estimate of the spectral radii of Bessel multipliers and consequences
Rosario Corso
Bessel multipliers are operators defined from two Bessel sequences of elements of a Hilbert space and a complex sequence, and have frame multipliers as particular cases. In this pa…