Orlicz valuations Gangsong LengJin Li Indiana University Mathematics Journal 2017 text pdf 10.1512/iumj.2017.66.6027 10.1512/iumj.2017.66.6027 en Indiana Univ. Math. J. 66 (2017) 791 - 819 state-of-the-art mathematics http://iumj.org/access/