A Primitive C-Algebra with no Non-Trivial Projections Philip Green Indiana University Mathematics Journal 1979 text pdf 10.1512/iumj.1979.28.28023 10.1512/iumj.1979.28.28023 en Indiana Univ. Math. J. 28 (1979) 349 - 351 state-of-the-art mathematics http://iumj.org/access/