Some Min-Max Methods for the Hamilton-Jacobi Equation L. Evans Indiana University Mathematics Journal 1984 text pdf 10.1512/iumj.1984.33.33002 10.1512/iumj.1984.33.33002 en Indiana Univ. Math. J. 33 (1984) 31 - 50 state-of-the-art mathematics http://iumj.org/access/