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monografia Rebiun29629285 https://catalogo.rebiun.org/rebiun/record/Rebiun29629285 180425S1992 0usa 0101 00eng0d 0-387-97901-8 UPM 991003578209704212 UPM eng Progress in approximation theory an international perspective : [proceedings] A.A. Gonchar, E.B. Saff, editors New York Springer-Verlag 1992 New York New York Springer-Verlag XVIII, 451 p. 24 cm XVIII, 451 p. Springer series in computational mathematics 19 Proceedings of an international conference on approximation theory that was held March 19 to 22, 1990, at the University of South Florida, Tampa Aproximación. Gonchar, A. A. Saff, Edward B.