THOMPSON'S THEOREM FOR COMPACT OPERATORS AND DIAGONALS OF UNITARY OPERATORS John JasperJireh LoreauxG. Weiss Indiana University Mathematics Journal 2018 text pdf 10.1512/iumj.2018.67.6291 10.1512/iumj.2018.67.6291 en Indiana Univ. Math. J. 67 (2018) 1 - 27 state-of-the-art mathematics http://iumj.org/access/