Galaktionov, V. A.Herrero, Miguel A.Velázquez, J.J. L.Lloyd, N. G.Ni, W. M.Peletier, L. A.Serrin, J.2023-06-202023-06-201992978-1-4612-6741-610.1007/978-1-4612-0393-3_16https://hdl.handle.net/20.500.14352/60766Proceedings of the conference held in Gregynog, Wales, August 20–29, 1989We consider nonnegative solutions of the semilinear parabolic equation u t —u xx + u p = 0, -∞<x< +∞, t>0, 0<p<l, which vanish at the extinction point x = 0 at a time t = T. By means of formal methods, we derive a family of asymptotic expansions for solutions and interface curves (these last separating the regions where u = 0 and u> 0), as (x,t) approaches (0,T).book parthttp://link.springer.com/chapter/10.1007/978-1-4612-0393-3_16http://www.springer.commetadata only access517.956.4Semilinear parabolic equationextinction pointformal methodsfamily of asymptotic expansionsEcuaciones diferenciales1202.07 Ecuaciones en Diferencias