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Connected perimeter of planar sets

We introduce a notion of connected perimeter for planar sets defined as the lower semi-continuous envelope of perimeters of approximating sets which are measure-theoretically connected. A companion notion of simply connected perimeter is also studied. We prove a representation formula which links the connected perimeter, the classical perimeter, and the length of suitable Steiner trees. We also discuss the application of this notion to the existence of solutions to a nonlocal minimization problem.

preprint2020arXivOpen access
François DayrensSimon MasnouMatteo NovagaMarco Pozzetta
math.FA
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Open access4 authors1 topic
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François DayrensSimon MasnouMatteo NovagaMarco Pozzetta

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