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The best sobolev trace constant in periodic media for critical and subcritical exponents
Authors
J.F. Bonder
R. Orive
J.D. Rossi
Publication date
1 January 2009
Publisher
Abstract
In this paper we study homogenisation problems for Sobolev trace embedding H1(Ω) Lq(∂Ω) in a bounded smooth domain. When q = 2 this leads to a Steklov-like eigenvalue problem. We deal with the best constant of the Sobolev trace embedding in rapidly oscillating periodic media, and we consider H1 and Lq spaces with weights that are periodic in space. We find that extremals for these embeddings converge to a solution of a homogenised limit problem, and the best trace constant converges to a homogenised best trace constant. Our results are in fact more general; we can also consider general operators of the form aε(x, ∇u) with non-linear Neumann boundary conditions. In particular, we can deal with the embedding W1,p(Ω) Lq(∂Ω). © 2009 Glasgow Mathematical Journal Trust.Fil:Rossi, J.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
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Last time updated on 14/08/2024