A Direct Iterative Method for an Abstract Cauchy-Kowalewsky Theorem Thomas Pate Indiana University Mathematics Journal 1981 text pdf 10.1512/iumj.1981.30.30032 10.1512/iumj.1981.30.30032 en Indiana Univ. Math. J. 30 (1981) 415 - 425 state-of-the-art mathematics http://iumj.org/access/