Differential and Integral Equations

Renormalized variational principles and Hardy-type inequalities

Satyanad Kichenassamy

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Let $\Omega\subset{{\mathbb{R}}}^2$ be a bounded domain on which Hardy's inequality holds. We prove that $[\exp(u^2)-1]/\delta^2\in L^1(\Omega)$ if $u\in H^1_0(\Omega)$, where $\delta$ denotes the distance to $\partial\Omega$. The corresponding higher-dimensional result is also given. These results contain both Hardy's and Trudinger's inequalities, and yield a new variational characterization of the maximal solution of the Liouville equation on smooth domains, in terms of a renormalized functional. A global $H^1$ bound on the difference between the maximal solution and the first term of its asymptotic expansion follows.

Article information

Differential Integral Equations, Volume 19, Number 4 (2006), 437-448.

First available in Project Euclid: 21 December 2012

Permanent link to this document

Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 35J60: Nonlinear elliptic equations
Secondary: 35J20: Variational methods for second-order elliptic equations 42B30: $H^p$-spaces


Kichenassamy, Satyanad. Renormalized variational principles and Hardy-type inequalities. Differential Integral Equations 19 (2006), no. 4, 437--448. https://projecteuclid.org/euclid.die/1356050507

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