Can any unconditionally convergent multiplier be transformed to have the symbol (1) and Bessel sequences by shifting weights?

Details Can any unconditionally convergent multiplier be transformed to have the symbol (1) and Bessel sequences by shifting weights? Can any unconditionally convergent multiplier be transformed to have the symbol (1) and Bessel sequences by shifting weights?

2011-08-29

arxiv.org/abs/1108.5629v1

Mathematics

Functional Analysis

Scientific paper

Multipliers are operators that combine (frame-like) analysis, a multiplication with a fixed sequence, called the symbol, and synthesis. They are very interesting mathematical objects that also have a lot of applications for example in acoustical signal processing. It is known that bounded symbols and Bessel sequences guarantee unconditional convergence. In this paper we investigate necessary and equivalent conditions for the unconditional convergence of multipliers. In particular we show that, under mild conditions, unconditionally convergent multipliers can be transformed by shifting weights between symbol and sequence, into multipliers with symbol (1) and Bessel sequences.

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