2015
DOI: 10.4171/jems/576
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Regularity of stable solutions of $p$-Laplace equations through geometric Sobolev type inequalities

Abstract: In this paper we prove a Sobolev and a Morrey type inequality involving the mean curvature and the tangential gradient with respect to the level sets of the function that appears in the inequalities. Then, as an application, we establish a priori estimates for semi-stable solutions of −∆ p u = g(u) in a smooth bounded domain Ω ⊂ R n . In particular, we obtain new L r and W 1,r bounds for the extremal solution u ⋆ when the domain is strictly convex. More precisely, we prove that u ⋆ ∈ L ∞ (Ω) if n ≤ p + 2 and u… Show more

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Cited by 14 publications
(55 citation statements)
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“…In this paper, in the spirit of the clever proof of [25] for the case p = 2, we extend some of the results of [10] for the degenerate p-Laplacian to the singular case 1 < p < 2. We obtain the boundedness of the extremal solution up to a critical dimension n p = p + 2 while we prove that it belongs to L 2n n−p−2 (Ω) if n > p + 2, for any smooth bounded domain Ω, under a standard (asymptotic) convexity assumption on the nonlinearity.…”
Section: Introduction and Main Resultsmentioning
confidence: 94%
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“…In this paper, in the spirit of the clever proof of [25] for the case p = 2, we extend some of the results of [10] for the degenerate p-Laplacian to the singular case 1 < p < 2. We obtain the boundedness of the extremal solution up to a critical dimension n p = p + 2 while we prove that it belongs to L 2n n−p−2 (Ω) if n > p + 2, for any smooth bounded domain Ω, under a standard (asymptotic) convexity assumption on the nonlinearity.…”
Section: Introduction and Main Resultsmentioning
confidence: 94%
“…if n > p + 2, where C 2 = C 2 (n, p, r). The borderline case n = p + 2 is slightly more involved, but we are still able to prove a Morrey type inequality as for the case n < p + 2 (see page 22 in [10] for the details). Lemma 2.1 is thus proved.…”
Section: Proof Of Theorem 11 Part (C)mentioning
confidence: 83%
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“…Some years later, Castorina and Sanchón [51] obtained the boundedness of stable solutions in dimension…”
Section: Background and Known Resultsmentioning
confidence: 99%
“…Among other results, they established pointwise, L q and W 1,q estimates which are optimal and do not depend on the non-linearity h(s). Furthermore, Castorina and Sanchón [9] obtain a priori estimates for semi-stable solutions of the reaction-diffusion problem −∆ p u = h(u) in Ω while the reaction term is driven by any positive C 1 non-linearity h and, as a main tool, they develop Morrey-type and Sobolev-type inequalities that involve the functional…”
Section: (12)mentioning
confidence: 99%