The celebrated criterion of Petrowsky for the regularity of the latest boundary point, originally formulated for the heat equation, is extended to the so-called -parabolic eqtlation. A barrier is constructed by the aid of the Barenblatt solution.
Cite this article
Peter Lindqvist, A criterion of Petrowsky's kind for a degenerate quasilinear parabolic equation. Rev. Mat. Iberoam. 11 (1995), no. 3, pp. 569–578