# CONFLUENTES MATHEMATICI

Characteristic functions on the boundary of a planar domain need not be traces of least gradient functions
Confluentes Mathematici, Volume 9 (2017) no. 1, pp. 65-93.

Given a smooth bounded planar domain $Ø$, we construct a compact set on the boundary such that its characteristic function is not the trace of a least gradient function. This generalizes the construction of Spradlin and Tamasan [3] when $Ø$ is a disc.

Revised:
Accepted:
Published online:
DOI: 10.5802/cml.36
Classification: 26B30,  35J56
Keywords: traces of functions of bounded variation, least gradient problem
Mickaël Dos Santos 1

1 Université Paris Est-Créteil, 61 avenue du Général de Gaulle, 94010 Créteil Cedex, France
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Mickaël Dos Santos. Characteristic functions on the boundary of a planar domain need not be traces of least gradient functions. Confluentes Mathematici, Volume 9 (2017) no. 1, pp. 65-93. doi : 10.5802/cml.36. https://cml.centre-mersenne.org/articles/10.5802/cml.36/

[1] G. Anzellotti; M. Giaquinta Funzioni $BV$ e tracce, Rend. Sem. Mat. Univ. Padova, Volume 60 (1978), pp. 1-21

[2] E. Giusti Minimal surfaces and functions of bounded variation, Springer Science & Business Media, 1984 no. 80

[3] G. Spradlin; A. Tamasan Not All Traces on the Circle Come from Functions of Least Gradient in the Disk, Indiana Univ. Math. J., Volume 63 (2014) no. 3, pp. 1819-1837 | Article

[4] P. Sternberg; G. Williams; W. Ziemer Existence, uniqueness, and regularity for functions of least gradient., J. reine angew. Math., Volume 430 (1992), pp. 35-60

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