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The truncated matrix trigonometric moment problem with an open gap

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Zagorodnyuk S.

Concrete Operators

2015

tom 2

nr 1

This paper is a continuation of our previous investigations on the truncated matrix trigonometric moment problem in Ukrainian Math. J., 2011, 63, no. 6, 786-797, and Ukrainian Math. J., 2013, 64, no. 8, 1199- 1214. In this paper we shall study the truncated matrix trigonometric moment problem with an additional constraint posed on the matrix measure MT(δ), δ ∈ B(T), generated by the seeked function M(x): MT(∆) = 0, where ∆ is a given open subset of T (called a gap). We present necessary and sufficient conditions for the solvability of the moment problem with a gap. All solutions of the moment problem with a gap can be constructed by a Nevanlinna-type formula.

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1 Concrete Operators

1 Zagorodnyuk S.

1 2014

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The truncated matrix trigonometric moment problem with an open gap