We consider the Cauchy problem for the evolutive discrete p-Laplacian in infinite graphs, with initial data decaying at infinity. We prove optimal sup and gradient bounds for nonnegative solutions, when the initial data has finite mass, and also sharp evaluation for the confinement of mass, i.e., the effective speed of propagation. We provide estimates for some moments of the solution, defined using the distance from a given vertex. Our technique relies on suitable inequalities of Faber-Krahn type, and looks at the local theory of continuous nonlinear partial differential equations. As it is known, however, not all of this approach can have a direct counterpart in graphs. A basic tool here is a result connecting the supremum of the solution at a given positive time with the measure of its level sets at previous times. We also consider the case of slowly decaying initial data, where the total mass is infinite.

Asymptotic Estimates for the p-Laplacian on Infinite Graphs with Decaying Initial Data / Andreucci, D.; Tedeev, A. F.. - In: POTENTIAL ANALYSIS. - ISSN 0926-2601. - (2020). [10.1007/s11118-019-09784-w]

Asymptotic Estimates for the p-Laplacian on Infinite Graphs with Decaying Initial Data

Andreucci D.;
2020

Abstract

We consider the Cauchy problem for the evolutive discrete p-Laplacian in infinite graphs, with initial data decaying at infinity. We prove optimal sup and gradient bounds for nonnegative solutions, when the initial data has finite mass, and also sharp evaluation for the confinement of mass, i.e., the effective speed of propagation. We provide estimates for some moments of the solution, defined using the distance from a given vertex. Our technique relies on suitable inequalities of Faber-Krahn type, and looks at the local theory of continuous nonlinear partial differential equations. As it is known, however, not all of this approach can have a direct counterpart in graphs. A basic tool here is a result connecting the supremum of the solution at a given positive time with the measure of its level sets at previous times. We also consider the case of slowly decaying initial data, where the total mass is infinite.
2020
Asymptotics for large times; Cauchy problem; Estimates from above and below; Faber-Krahn inequality; Graphs; p-Laplacian
01 Pubblicazione su rivista::01a Articolo in rivista
Asymptotic Estimates for the p-Laplacian on Infinite Graphs with Decaying Initial Data / Andreucci, D.; Tedeev, A. F.. - In: POTENTIAL ANALYSIS. - ISSN 0926-2601. - (2020). [10.1007/s11118-019-09784-w]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1363562
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