This book is an introduction to convolution operators with matrix-valued almost periodic or
semi-almost periodic symbols. The basic tools for the treatment of the operators are Wiener …

This paper introduces a new method for constructing approximate solutions to a class of
Wiener--Hopf equations. This is particularly useful since exact solutions of this class of …

This paper is devoted to the question to obtain (algebraic and topologic) equivalence (after
extension) relations between convolution type operators on unions of intervals and …

The authors study n-and d-normality and compute the index of systems of singular integral
equations with a semi-almost periodic matrix-valued coefficient G, as well as the index of …

Convolution type operators acting between Bessel potential spaces defined on a union of
two finite intervals are studied from the point of view of their regularity properties. The …

Toeplitz operators with symbols generated by slowly oscillating and semi-almost periodic
matrix functions Page 1 TOEPLITZ OPERATORS WITH SYMBOLS GENERATED BY SLOWLY …

The vector Riemann–Hilbert problem is analysed when the entries of its matrix coefficient
are meromorphic and almost periodic functions. Three cases for the meromorphic functions …

This note deals with a class of convolution operators of the first kind on a finite interval.
Necessary and sufficient conditions for such an operator to be Fredholm are given. The …

This is a concise survey of some results and open problems concerning Wiener-Hopf
factorization and almost periodic factorization of matrix functions. Several classes of …

We establish Fredholm criteria and index formulas for Toeplitz operators with semialmost
periodic matrix-valued symbols on the Hardy spaces corresponding to L p spaces on the …