A new approach to nonlinear singular integral operators depending on three parameters

Abstract

AbstractIn this paper, we present some theorems on weighted approximation by two dimensional nonlinear singular integral operators in the following form: $${T_\lambda }(f;x,y) = \iint\limits_{{\mathbb{R}^2}}K_\lambda {(t - x,s - y,f(t,s))dsdt,\;(x,y) \in {\mathbb{R}^2},\lambda \in \Lambda ,}$$ where Λ is a set of non-negative numbers with accumulation point λ0.