Approximation Theory: Proceedings of the Conference Jointly Organized by the Mathematical Institute of the Polish Academy of Sciences and the Institute of Mathematics of the Adam Mickiewicz University Held in Pozna?, 22–26 August, 1972

On the best approximation of the operators of differentiation and related questions.- A generalization of theorems of Korovkin on conditions for and the order of convergence of a sequence of positive operators.- On the uniform continuity of the operator of best approximation..- Stetigkeitseigenschaften von Optimierungsaufgaben und lineare Tschebyscheff-Approximation.- Spline bases in function spaces.- Saturationstheorie auf kompakten topologischen Gruppen.- Uniform approximation on closed sets by functions analytic on a Riemann surface.- Die Ableitungen der algebraischen Polynome bester Approximation.- Zur Approximationstheorie für Summationsprozesse von Fourier-Entwicklungen in Banach-Räumen: Vergleichssätze und Ungleichungen vom Bernstein-Typ.- Approximation of functions of several variables by the sums of two functions of a smaller number of variables.- The convergence of Bergman functions for a decreasing sequence of domains.- n-parametrige Halbgruppen von Operatoren in der Approximationstheorie.- On strong approximation of Fourier series.- On linear juxtaoperators.- On trigonometric interpolation with equidistant knots.- Konstruktive Approximationstheorie mit Hilfe von Jacobi-Polynomen und Kugelfunktionen.- Some decompositions of functional spaces by means of quasi-analytic functions of several variables.- Zur Theorie der saturierten Approximationsverfahren auf lokalkompakten abelschen Gruppen.- A comparison approach to direct theorems for polynomial spline approximation.- Eine Substitutionsmethode zur Bestimmung von Nikolski?-Konstanten 215.- Interpolating splines.- On the best approximation of factorized Fourier series.- On the Riesz means of Fourier-Bessel series.- Polynomial approximation and structural properties of functions defined on subsets of the complex plane..- Trigonometric interpolation polynomials which gives best order of approximation among continuously dif-ferentiable functions of certain order.- Hermite-Fejér interpolation on the Jacobi abscissas 281.- Problems.