Asymptotic Behavior of Solutions of u_t = \Delta u^m as m \rightarrow \infty Luis CaffarelliAvner Friedman Indiana University Mathematics Journal 1987 text pdf 10.1512/iumj.1987.36.36041 10.1512/iumj.1987.36.36041 en Indiana Univ. Math. J. 36 (1987) 711 - 728 state-of-the-art mathematics http://iumj.org/access/