Monotonicity of non-pluripolar Monge-Ampère masses David Witt Nyström Indiana University Mathematics Journal 2019 text pdf 10.1512/iumj.2019.68.7630 10.1512/iumj.2019.68.7630 en Indiana Univ. Math. J. 68 (2019) 579 - 591 state-of-the-art mathematics http://iumj.org/access/