TY - JOUR AU - Gilding, B. H. AU - Herrero, Miguel A. PY - 1988 DO - 10.1007/BF01456972 SN - 0025-5831 UR - https://hdl.handle.net/20.500.14352/57778 T2 - Mathematische Annalen AB - The authors consider the initial-boundary value problem for the porous medium equation ut =(um)xx in (0,∞)×(0,T), where m>1, 0