Padé and Hermite-Padé approximation and orthogonality.
Quantitative Krovkin Type Theorems on Simultaneous Approximation.
Remarks on orthogonal polynomials with respect to varying measures and related problems.
Simultaneous Approximation and Chebyshev Centres in Metric Spaces
Simultaneous approximation by a class of Bernstein-Durrmeyer operators preserving linear functions
We introduce and study a one-parameter class of positive linear operators constituting a link between the well-known operators of S. N. Bernstein and their genuine Bernstein-Durrmeyer variants. Several limiting cases are considered including one relating our operators to mappings investigated earlier by Mache and Zhou. A recursion formula for the moments is proved and estimates for simultaneous approximation of derivatives are given.
Simultaneous approximation by linear combination of modified bernstein polynomials
Simultaneous approximation by Lupaş modified operators with weighted function of Szász operators.
Simultaneous approximation by two dimensional hybrid positive linear operators.
Simultaneous approximation for the Phillips operators.
Simultaneous approximation in negative norms of arbitrary order
Some aspects of simultaneous rational approximation
Some properties of generalized Szàsz type operators of two variables
Suitable norms for simultaneous approximation.
The Lagrange theorem for multidimensional diophantine approximation.
Ungleichungen für (e/a)a (b/e)b.
Universal approximation theorem for Dirichlet series.
Voronovskaja's theorem and the exact degree of approximation for the derivatives of complex Riesz–Zygmund means.
О скорости покоэффициентной сходимости совместных приближений, получаемых по алгоритму Якоби-Перрона.
О совместных аппроксимациях Паде функций стилтьесовского типа.
Одновременная аппроксимация полиномами на окружности и внутри круга