Bounded Orbits of Conjugation, Analytic Theory Paul Roth Indiana University Mathematics Journal 1983 text pdf 10.1512/iumj.1983.32.32035 10.1512/iumj.1983.32.32035 en Indiana Univ. Math. J. 32 (1983) 491 - 509 state-of-the-art mathematics http://iumj.org/access/