On Area-Minimizing Hypersurfaces in Manifolds of Non-Negative Curvature Michael Anderson Indiana University Mathematics Journal 1983 text pdf 10.1512/iumj.1983.32.32049 10.1512/iumj.1983.32.32049 en Indiana Univ. Math. J. 32 (1983) 745 - 760 state-of-the-art mathematics http://iumj.org/access/