Waiting time effects for Gauss curvature flows D. ChoppL. EvansH. Ishii Indiana University Mathematics Journal 1999 text pdf 10.1512/iumj.1999.48.1556 10.1512/iumj.1999.48.1556 en Indiana Univ. Math. J. 48 (1999) 311 - 334 state-of-the-art mathematics http://iumj.org/access/