A Priori Regularity of Parabolic Partial Differential Equations

F. Berkemeier, Diogo A. Gomes

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Abstract

    We consider parabolic partial differential equations and develop methods that provide a priori estimates for solutions with singular initial data. These estimates are obtained by understanding the time decay of norms of solutions. First, we derive regularity results for the Fokker-Planck equation by estimating the decay of Lebesgue norms. These estimates depend on integral bounds for the advection and diffusion. Then, we apply similar methods to the heat equation. Finally, we conclude by extending our techniques to the porous media equation. The sharpness of our results is confirmed by examining known solutions of these equations. Our main contribution is the use of functional inequalities to establish the decay of norms through nonlinear differential inequalities. These are then combined with ODE methods to deduce estimates for the norms of solutions and their derivatives.
    Original languageEnglish (US)
    Title of host publicationNew Trends in Analysis and Geometry
    PublisherCambridge Scholars Publishing
    ISBN (Print)978-1-5275-4563-2
    StatePublished - 2019

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