Convolution Operators and Factorization of Almost Periodic Matrix Functions (Hardcover)

Descripción:

Hardcover. This volume provides 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-Hopf factorisation and almost periodic factorization. These factorisations are systematically investigated and explicitly constructed for interesting concrete classes of matrix functions. The material covered by this book ranges from classical results through to a first comprehensive presentation of the core of the theory of almost periodic factorization up to the latest achievements, such as the construction of factorisations by means of the Portuguese transformation and the solution of corona theorems. This book is addressed to a wide audience in the mathematical and engineering sciences. It is accessible to readers with basic knowledge in functional, real, complex and harmonic analysis, and it should be of interest to those who have to deal with the factorization of operators or matrix functions. Convolutions by integrable kernels have continuous symbols and the Cauchy singular integral operator is the most prominent example of a convolution operator with a piecewise continuous symbol. Shipping may be from multiple locations in the US or from the UK, depending on stock availability. N° de ref. del artículo 9783764366728

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Sinopsis:

Reseña del editor: Many problems of the engineering sciences, physics, and mathematics lead to con­ volution equations and their various modifications. Convolution equations on a half-line can be studied by having recourse to the methods and results of the theory of Toeplitz and Wiener-Hopf operators. Convolutions by integrable kernels have continuous symbols and the Cauchy singular integral operator is the most prominent example of a convolution operator with a piecewise continuous symbol. The Fredholm theory of Toeplitz and Wiener-Hopf operators with continuous and piecewise continuous (matrix) symbols is well presented in a series of classical and recent monographs. Symbols beyond piecewise continuous symbols have discontinuities of oscillating type. Such symbols emerge very naturally. For example, difference operators are nothing but convolution operators with almost periodic symbols: the operator defined by (A