Rate of convergence of the discrete Pólya algorithm from convex sets. A particular case.
Relative Korovkin-Sätze und Ränder.
Remark on spline unconditional bases in
Remarks on remotal sets in vector valued function spaces.
Representation formulae for (C₀) m-parameter operator semigroups
Some general representation formulae for (C₀) m-parameter operator semigroups with rates of convergence are obtained by the probabilistic approach and multiplier enlargement method. These cover all known representation formulae for (C₀) one- and m-parameter operator semigroups as special cases. When we consider special semigroups we recover well-known convergence theorems for multivariate approximation operators.
Representation formulas for cosine and sine functions of operators II.