Degree of simultaneous approximation of bivariate functions by Gordon operators
The author investigates the degree of approximation of bivariate functions on a rectangle by various spline-blended operators, using mixed moduli of smoothness of higher orders after a generalization of a theorem of Sharma and Meir for the univariate case, he proves permanence principles for multivariate cases showing how the blending operators inherit quantitative properties from the univariate case.
degree of approximation of bivariate functions
scientific article; zbMATH DE number 4214644
scientific article