Singer, Ivan The theory of best approximation and functional analysis/ Ivan Singer. - Philadelphia: SIAM, 1974. - 95 p. - CBMS-NSF Regional conference series in applied mathematics; . - CBMS-NSF Regional conference series in applied mathematics; 13. . Includes bibliographies. ISBN: 9780898710106 LCCN: 74182915 Subjects--Topical Terms: Functional analysis.Approximation theory. Dewey Class. No.: 515/.7