Functional Analysis and Applications

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Seminar on
Functional Analysis and Applications

Supported by The Centre of Functional Analysis and Applications - CEAF
and FCT project POCTI/MAT/59972/2004.

June 29, 2007, Friday - 15h15 (Room P 3.10):

A Fredholm characterization for Wiener-Hopf-Hankel operators with semi-almost periodic symbols

Ana Paula Nolasco

(Universidade de Aveiro)

Abstract. It will be presented a characterization of Fredholm and invertibility properties for Wiener-Hopf-Hankel operators with semi-almost periodic Fourier symbols and acting between L2 Lebesgue spaces, based on the mean motions and geometric mean values of the almost periodic representatives of the Fourier symbols at minus and plus infinity. Additionally, a formula for the Fredholm index is derived, as well as some conditions for the invertibility of the operators.

Seminars take place in Lisbon, I.S.T. - Post Graduation Building

Webpage: http://www.math.ist.utl.pt/funcional