Bellman, Richard Ernest, 1920- Methods of nonlinear analysis / by Richard Bellman. - New York : Academic Press, 1970. - 330 p. : ill. ; 24 cm. - Mathematics in science and engineering ; v.61, 1-2 . Includes bibliographical references. Subjects--Topical Terms: Nonlinear theoriesDifferential equations, NonlinearNumerical analysis