Kernels of Wiener-Hopf plus Hankel operators with matching generating functions

Abstract

Considered are Wiener--Hopf plus Hankel operators $W(a)+H(b):L^p({\mathbb{R}}^{+})\to L^p({\mathbb{R}}^{+})$ with generating functions $a$ and $b$ from a subalgebra of $L^{\infty }(\mathbb{R})$ containing almost periodic functions and Fourier images of $L^1(\mathbb{R})$-functions. If the generating functions $a$ and $b$ satisfy the matching condition \begin{equation*} a(t) a(-t)=b(t) b(-t),\quad t\in\mathbb{R}, \end{equation*} an explicit description for the kernels and cokernels of the operators mentioned is given.

19 pages