This volume contains refereed articles originating from the 3rd International Dortmund Meeting on Approximation Theory in Witten-Bommerholz. The contributors are renowned international experts in their individual fields of research, including, in particular, approximation methods, orthogonal polynomials, radial basis functions, multivariate spline approximation and interpolation, Pade approximation, polynomial approximation, and quasi-interpolation.

Preface.- List of Participants.- Contributions by H. Bavinck, M.G. de Bruin, W. zu Castell, D.H. Mache, F. Fibir, N.L. Fernandez, C. Fredebeul, M. Hollenhorst, V.N. Konovalov, R. Lasser, D. Leviatan, D.S. Lubinsky, H.N. Mhaskar, J. Obermaier, I. Rasa, M. Revers, C.H. Rohwer, P. Sablonniere, R. Schablack, J. Szabados, L. Szili, R. Szwarc, V. Totic, P. Vertesi, H. Wendland.