On the Tonelli method for the degenerate parabolic Cauchy problem with functional argument
Krzysztof A. Topolski
Abstract. The degenerate parabolic Cauchy problem is considered. A functional argument in the equation is of the Hale type. As a limit of piecewise classical solutions we obtain a viscosity solution of the main problem. Presented method is an adaptation of Tonelli's constructive method to the partial differential-functional equation. It is also shown that this approach can be improved by the vanishing viscosity method and regularisation process.
Keywords: viscosity solutions, parabolic equation, differential-functional equation.
Mathematics Subject Classification: 35A01, 35K15, 35K60.