Volume 56, Issue 7 pp. 926-955

Plateau's problem for parametric double integrals: I. Existence and regularity in the interior

Stefan Hildebrandt

Stefan Hildebrandt

Universität Bonn, Mathematisches Institut, Beringstraße 1, D-53115 Bonn, Germany

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Heiko von der Mosel

Heiko von der Mosel

Universität Bonn, Mathematisches Institut, Beringstraße 1, D-53115 Bonn, Germany

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First published: 23 April 2003
Citations: 9

In memory of Jürgen Moser, teacher and friend

Abstract

We study Plateau's problem for two-dimensional parametric integrals

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the Lagrangian F(x, z) of which is positive definite and at least semi-elliptic. It turns out that there always exists a conformally para-me-trized minimizer. Any such minimizer X is seen to be Hölder-continuous in the parameter domain B and continuous up to its boundary. If F possesses a perfect dominance function G of class C2, we can establish higher regularity of X in the interior. In fact, we prove XHloc2,2(B, ℝn) ∩ C1,σ(B, ℝn) for some σ > 0. Finally, we discuss the existence of perfect dominance functions.

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