# Traces of functions of bounded A-variation and variational problems with linear growth

Breit D, Diening L, Gmeineder F (2017)
arXiv:1707.06804.

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Preprint | Englisch
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Abstract / Bemerkung
In this paper, we consider the space $BV^{A}(\Omega)$ of functions of bounded $A$-variation. For a given first order linear homogeneous differential operator with constant coefficients $A$, this is the space of $L^1$--functions $u:\Omega\rightarrow R^N$ such that the distributional differential expression $A u$ is a finite (vectorial) Radon measure. We show that for Lipschitz domains $\Omega\subset R^{n}$, $BV^{A}(\Omega)$--functions have an $L^1(\partial\Omega)$--trace if and only if $A$ is $C$-elliptic (or, equivalently, if the kernel of $A$ is finite dimensional). The existence of an $L^1(\partial\Omega)$--trace was previously only known for the special cases that $A u$ coincides either with the full or the symmetric gradient of the function $u$ (and hence covered the special cases $BV$ or $BD$). As an application we study quasiconvex variational functionals with linear growth depending on $A u$ and show the existence of a minimiser in $BV^{A}(\Omega)$.
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arXiv:1707.06804
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Breit D, Diening L, Gmeineder F. Traces of functions of bounded A-variation and variational problems with linear growth. arXiv:1707.06804. 2017.
Breit, D., Diening, L., & Gmeineder, F. (2017). Traces of functions of bounded A-variation and variational problems with linear growth. arXiv:1707.06804
Breit, D., Diening, L., and Gmeineder, F. (2017). Traces of functions of bounded A-variation and variational problems with linear growth. arXiv:1707.06804.
Breit, D., Diening, L., & Gmeineder, F., 2017. Traces of functions of bounded A-variation and variational problems with linear growth. arXiv:1707.06804.
D. Breit, L. Diening, and F. Gmeineder, “Traces of functions of bounded A-variation and variational problems with linear growth”, arXiv:1707.06804, 2017.
Breit, D., Diening, L., Gmeineder, F.: Traces of functions of bounded A-variation and variational problems with linear growth. arXiv:1707.06804. (2017).
Breit, Dominic, Diening, Lars, and Gmeineder, Franz. “Traces of functions of bounded A-variation and variational problems with linear growth”. arXiv:1707.06804 (2017).

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arXiv: 1707.06804