Obstructions to the Existence of Normally Hyperbolic Inertial Manifolds John Mallet-ParetGeorge SellZhoude Shao Indiana University Mathematics Journal 1993 text pdf 10.1512/iumj.1993.42.42048 10.1512/iumj.1993.42.42048 en Indiana Univ. Math. J. 42 (1993) 1027 - 1055 state-of-the-art mathematics http://iumj.org/access/