Abstract
We propose a new approach to defining the notion of a solution to linear and nonlinear parabolic equations. The main idea consists in studying connections between solutions to dynamic problems in the variational shape and the properties of the corresponding Lyapunov functionals which are strictly decreasing along the trajectories of the above-mentioned dynamic equations except for the equilibrium points. It turns out that the families of Lyapunov functionals constructed by T. I. Zelenyak enable us to propose a new approach to defining solutions to both linear and nonlinear parabolic problems. All results are given in the case of smooth solutions. Note that the Lyapunov functionals can be used for studying solutions with unbounded gradients.
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Original Russian Text Copyright © 2005 Lavrent'ev Jr. M. M.
The author was supported by the Russian Foundation for Basic Research (Grants 00-07-90343; 00-15-99092).
In memory of Tadei Ivanovich Zelenyak.
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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 46, No. 5, pp. 1085–1099, September–October, 2005.
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Lavrent'ev, M.M. Solution of Parabolic Equations by Means of Lyapunov Functionals. Sib Math J 46, 867–878 (2005). https://doi.org/10.1007/s11202-005-0085-z
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DOI: https://doi.org/10.1007/s11202-005-0085-z