TY - BOOK AU - Lorentz,G.G. TI - Approximation of functions SN - 0828403228 AV - QA221 .L6 1986 PY - 1986///] CY - New York, N.Y. PB - Chelsea Pub. Company KW - Approximation theory N1 - Includes index; Bibliography: pages 179-184 ER -