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Hardcover. Zustand: Very Good. 8vo (24.5 cm), 316 pp. Publisher's cloth and dust jacket (dj slightly frayed at extremities and sunned, number written at the head, binding and internally very good). Banach Center Publications Volume 4. Papers presented at the Stefan Banach Center at the Semester held September 17-December 17, 1975. Contents include: "Approximation in metric linear spaces" by Günter Albinus; "Inequalities for fractional derivatives on the half-line" by V. Areatov; "On the uniform continuity of metric projection" by V. Berdyshev; "Local Lipschitz continuity of the metric projection operator" by B. Björnestål; "Equivalence, unconditionality and convergence a.e. of the spline bases in Lp spaces" by Z. Ciesielski; "Approximation of double coset spaces" by Bernd Dreseler, Walter Schempp; "On some applications of Bochner-Schoenberg-Eberlein type theorems" by Bernd Dreseler, Walter Schempp; "Zur Konstruktion von besten linearen Approximationen in normierten Räumen" by H. Kiesewetter; "On the strong summability and approximation of Fourier series" by L. Leindle; "Operator norm bounds and error bounds for quadratic spline interpolation" by Martin Marsden; "The upper bound of the norms of orthogonal projections onto subspaces of polygonal" by K. Oskolkow; "Quantitative estimates of N.N. Luzin's C-property for classes of integrable functions" by K. Oskolkow; "Properties of bounded orthonormal spline bases" by Stanis?aw Ropela; "On a generalization of the martingale maximal theorem" by F. Schipp; "Lower bounds for spline approximation" by Larry Schumaker; "Comparative approximation in two topologies" by H. Shapiro; "A counterexample in harmonic analysis" by H. Shapiro; "On Banach spaces in which every M-basis is a generalized summation basis" by Ivan Singer; "A relation between Fourier transforms in one and two variables" by Per Sjölin; "Indirect approximation theorems in Lp-metrics (1<p<?)" by R. Taberski; "On unconditional convergence of Haar series" by G. Tkebuchava; "A multiplier in Besov spaces which is not a multiplier in Lebesgue spaces" by Hans Triebel; "On the dual of weighted H1(|z|<1)" by Richard Wheeden; "On the application of the orthonormal Franklin system to the approximation of analytic functions" by Zugmunt Wronicz.