Approximation Properties of Some Multivariate Generalized Singular Integrals in the Unit Polydisk
The aim of this paper is to obtain several results in approximation by Jackson-type generalizations of multi-complex Picard, Poisson-Cauchy and Gauss-Weierstrass singular integrals in terms of higher order moduli of smoothness in polydisks.
generalized multi-complex singular integrals jackson-type estimates global smoothness preservation