Vanishing Theorems for Homology of Submanifolds Robert Hermann Indiana University Mathematics Journal 1965 text pdf 10.1512/iumj.1965.14.14032 10.1512/iumj.1965.14.14032 en Indiana Univ. Math. J. 14 (1965) 479 - 483 state-of-the-art mathematics http://iumj.org/access/