Maximum principles and isoperimetric inequalities for some Monge–Ampère-type problems

Enache, Cristian

doi:10.1016/j.crma.2013.10.035

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General ω ν =1

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2021

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Cited by 2 publications

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“…We note that similar maximum (or minimum) principles for more general fully nonlinear equations have been obtained in [2], [7], [8] and [9]. In what follows, we will show that we can prove a similar maximum principle (with weaker conditions) for the function ψ.…”

Section: General ω ν =supporting

confidence: 67%

Maximum principles and overdetermined problems for Hessian equations

Enache¹,

Marras²,

Porru³

2021

APAM

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In this article we investigate some Hessian type equations. Our main aim is to derive new maximum principles for some suitable P-functions, in the sense of L.E. Payne, that is for some appropriate functional combinations of u(x) and its derivatives, where u(x) is a solution of the given Hessian type equations. To find the most suitable P-functions, we first investigate the special case of a ball, where the solution of our Hessian equations is radial, since this case gives good hints on the best functional to be considered later, for general domains. Next, we construct some elliptic inequalities for the well-chosen P-functions and make use of the classical maximum principles to get our new maximum principles. Finally, we consider some overdetermined problems and show that they have solutions when the underlying domain has a certain shape (spherical or ellipsoidal).

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