Asymptotic Behavior, as t \rightarrow +\infty of Solutions of Navier-Stokes Equations and Nonlinear Spectral Manifolds Ciprian FoiasJ. Saut Indiana University Mathematics Journal 1984 text pdf 10.1512/iumj.1984.33.33025 10.1512/iumj.1984.33.33025 en Indiana Univ. Math. J. 33 (1984) 459 - 477 state-of-the-art mathematics http://iumj.org/access/