Calculus of Variations: A Differential Form Approach

Abstract

We study integrals of the form ${\int }_{\Omega }f\left(d{\omega }_1,\dots ,d{\omega }_m\right),$ where $m\ge 1$ is a given integer, $1\le k_i\le n$ are integers and ${\omega }_i$ is a $(k_i-1)$-form for all $1\le i\le m$ and $f:{\prod }_{i=1}^m{\Lambda }^{k_i}\left({\mathbb{R}}^n\right)\to \mathbb{R}$ is a continuous function. We introduce the appropriate notions of convexity, namely vectorial ext. one convexity, vectorial ext. quasiconvexity and vectorial ext. polyconvexity. We prove weak lower semicontinuity theorems and weak continuity theorems and conclude with applications to minimization problems. These results generalize the corresponding results in both classical vectorial calculus of variations and the calculus of variations for a single differential form.

To appear in Adv. Calc. Var

References in corpus (1)

• Calculus of Variations with Differential Forms

Cited by in corpus (1)

• Quasiconvexity, null Lagrangians, and Hardy space integrability under constant rank constraints