PageHeader : Funkcialaj Ekvacioj, 19 (1976) 271-277 Title : Parabolic Differential Equations with Title : a Singular Nonlinear Term AuthorInfo : By AuthorInfo : Wolfgang WALTER AuthorInfo : (Universitat Karlsruhe, Germany) section : 1. Introduction. section : 2. Nagumo's Lemma. section : 3. Upper bounds. section : 4. Lower bounds. section : 5. A more general problem. section : 6. Upper and lower bounds. section : References