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A maximum principle related to level surfaces of solutions of parabolic equations
1989
Journal of the Australian Mathematical Society
Let u be a solution of a parabolic equation ut = F (v, Du, D 2 u). Under convenient hypotheses it is proved that the angle between a given direction and the normal to the level surfaces of u(-,t) satisfies a maximum principle. 1980 Mathematics subject classification (Amer. Math. Soc.) (1985 Revision): 35 B 50.
doi:10.1017/s1446788700030342
fatcat:ocqhsbyubzet7l32b3oehjugrm