Some Results on u-Unitary, u-Self-Adjoint and Decomposable Operators Ali Jafarian Indiana University Mathematics Journal 1974 text pdf 10.1512/iumj.1974.23.23079 10.1512/iumj.1974.23.23079 en Indiana Univ. Math. J. 23 (1974) 975 - 979 state-of-the-art mathematics http://iumj.org/access/