Some Nonlinear Eigenvalue Problems L. Shampine Indiana University Mathematics Journal 1968 text pdf 10.1512/iumj.1968.17.17065 10.1512/iumj.1968.17.17065 en Indiana Univ. Math. J. 17 (1968) 1065 - 1072 state-of-the-art mathematics http://iumj.org/access/