Semiprime Ideals and Irreducible Ideals of the Ring of Bounded Operators on Hilbert Space David MorrisNorberto Salinas Indiana University Mathematics Journal 1974 text pdf 10.1512/iumj.1974.23.23048 10.1512/iumj.1974.23.23048 en Indiana Univ. Math. J. 23 (1974) 575 - 589 state-of-the-art mathematics http://iumj.org/access/