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Wiener-Hopf integral operators with PC symbols on spaces with Muckenhoupt weight.

Albrecht BöttcherIlya M. Spitkovsky — 1993

Revista Matemática Iberoamericana

We describe the spectrum and the essential spectrum and give an index formula for Wiener-Hopf integral operators with piecewise continuous symbols on the space L(R,ω) with a Muckenhoupt weight ω. Our main result says that the essential spectrum is a set resulting from the essential range of the symbol by joining the two endpoints of each jump by a certain sickle-shaped domain, whose shape is completely determined by the value of p and the behavior of the weight ω at the origin and at infinity.

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