Differentiability for Bounded Minimizers of Some Anisotropic Integrals (original) (raw)

2001, Journal of Mathematical Analysis and Applications

AI-generated Abstract

This study investigates the differentiability properties of bounded minimizers of certain anisotropic integrals. The research focuses on integrals with non-standard or p,q growth conditions, revealing new insights into higher integrability results. Key theorems demonstrate that if specific conditions on the integrands are satisfied, then bounded minimizers exhibit desirable regularity features, with implications for the fields of calculus of variations and geometric measure theory.

Non-probabilistic proof of the A_2 theorem, and sharp weighted bounds for the q-variation of singular integrals

Any Calderón-Zygmund operator T is pointwise dominated by a convergent sum of positive dyadic operators. We give an elementary selfcontained proof of this fact, which is simpler than the probabilistic arguments used for all previous results in this direction. Our argument also applies to the q-variation of certain Calderón-Zygmund operators, a stronger nonlinearity than the maximal truncations. As an application, we obtain new sharp weighted inequalities.

Regularity results for minimizers of irregular integrals with (p,q) growth

Forum Mathematicum, 2000

We consider variational integrals f Du dx where u X 3 R N and the convex function f has pY q growth jzj p f z Ljzj q 1, p`q. We prove local Lipschitz continuity of minimizers in the scalar case and in some vectorial cases. We further prove higher integrability and di¨erentiability for local minimizers. The results cover the case in which f is degenerate convex. A main feature of the paper is that we do not assume that f is di¨erentiable everywhere.

Sharp weighted bounds for the q-variation of singular integrals

Bulletin of the London Mathematical Society, 2013

Any Calderón-Zygmund operator T is pointwise dominated by a convergent sum of positive dyadic operators. We give an elementary selfcontained proof of this fact, which is simpler than the probabilistic arguments used for all previous results in this direction. Our argument also applies to the q-variation of certain Calderón-Zygmund operators, a stronger nonlinearity than the maximal truncations. As an application, we obtain new sharp weighted inequalities.

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