A hull with no nontrivial Gleason parts Brian ColeSwarup GhoshAlexander Izzo Indiana University Mathematics Journal 2018 text pdf 10.1512/iumj.2018.67.7300 10.1512/iumj.2018.67.7300 en Indiana Univ. Math. J. 67 (2018) 739 - 752 state-of-the-art mathematics http://iumj.org/access/