Wiener-Hopf plus Hankel operators on the real line with unitary and sectorial symbols

Details Wiener-Hopf plus Hankel operators on the real line with unitary and sectorial symbols Wiener-Hopf plus Hankel operators on the real line with unitary and sectorial symbols

2005-11-05

arxiv.org/abs/math/0511128v2

Mathematics

Functional Analysis

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Scientific paper

Wiener-Hopf plus Hankel operators acting between Lebesgue spaces on the real line are studied in view of their invertibility, one sided-invertibility, Fredholm, and semi-Fredholm properties. This is done in two different cases: (i) when the Fourier symbols of the operators are unitary functions, and (ii) when the Fourier symbols are related with sectorial elements appearing in factorizations of functions originated by the Fourier symbols of the operators. The obtained result for the case (i) may be viewed as a Douglas-Sarason type theorem for Wiener-Hopf plus Hankel operators.

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