Mappings and Morse Decompositions in the Conley Index Theory Christopher McCord Indiana University Mathematics Journal 1991 text pdf 10.1512/iumj.1991.40.40048 10.1512/iumj.1991.40.40048 en Indiana Univ. Math. J. 40 (1991) 1061 - 1082 state-of-the-art mathematics http://iumj.org/access/