Braess, Dietrich Nonlinear approximation theory Dietrich Braess - Berlin New York Springer-Verlag c1986 - xiv, 290 p ill 24 cm - Springer series in computational mathematics 7 . Contine bibliogr. si index ISBN: 0387136258 (U.S) LCCN: 86010101 Subjects--Topical Terms: Approximation theory