Discrete singular integrals in a half-space

Abstract

We consider Calderon -- Zygmund singular integral in the discrete half-space $h{\mathbf{Z}}_{+}^m$, where ${\mathbf{Z}}^m$ is entire lattice ($h>0$) in ${\mathbf{R}}^m$, and prove that the discrete singular integral operator is invertible in $L_2(h{\mathbf{Z}}_{+}^m$) iff such is its continual analogue. The key point for this consideration takes solvability theory of so-called periodic Riemann boundary problem, which is constructed by authors.

9 pages, 1 figure