On weighted lacunary interpolation.
On weighted Ostrowski type inequalities for operators and vector-valued functions.
On Zeros of Polynomials of Best Approximation to Holomorphic and C... Functions.
On -suns
Onesided approximation and real interpolation.
It is proved that the reiteration theorem is not valid for the spaces Ap (theta,q) defined by V. Popov by means of onesided approximation. It is also proved that a class of cones, defined by onesided approximation of piecewise linear functions on the interval [0,1], is stable for the real interpolation method.
One-sided approximation by trigonometric polynomials in -norm, 0
Open problems in constructive function theory.
Operator norm bounds and error bounds for quadratic spline interpolation
Operator semigroups and Poisson convergence in selected metrics.
Optimal Addition of Knots to Cubature Formulae for Planar Regions.
Optimal and Sard approximation
Optimal Approximation and Error Bounds in Seminormed Spaces.
Optimal Convergence of Minimum Norm Approximations in Hp.
Optimal cubature formulas in a reflexive Banach space
Sequences of cubature formulas with a joint countable set of nodes are studied. Each cubature formula under consideration has only a finite number of nonzero weights. We call a sequence of such kind a multicubature formula. For a given reflexive Banach space it is shown that there is a unique optimal multicubature formula and the sequence of the norm of optimal error functionals is monotonically decreasing to 0 as the number of the formula nodes tends to infinity.
Optimal Cycles in Doubly Weighted Graphs and Approximation of Bivariate Functions by Univariate Ones.
Optimal discrete approximation of continuous linear operators applicable to control problems
Optimal Extrapolation of Derivatives.
Optimal interpolatory splines using -spline representation
Optimal Interval Refinement near Singularities.
Optimal methods of integration in the class of differentiable functions