Invariant Subspaces, Dilation Theory, and the Structure of the Predual of a Dual Algebra. II Constantin ApostolHari BercoviciCiprian FoiasCarl Pearcy Indiana University Mathematics Journal 1985 text pdf 10.1512/iumj.1985.34.34046 10.1512/iumj.1985.34.34046 en Indiana Univ. Math. J. 34 (1985) 845 - 855 state-of-the-art mathematics http://iumj.org/access/