A priori estimates for solutions of fully nonlinear equations with convex level set Luis CaffarelliYu Yuan 35J:fully nonlinear equationHolder continuityconvexity Indiana University Mathematics Journal 2000 text pdf 10.1512/iumj.2000.49.1901 10.1512/iumj.2000.49.1901 en Indiana Univ. Math. J. 49 (2000) 681 - 696 state-of-the-art mathematics http://iumj.org/access/