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Jun 15, 2020 at 7:27 history edited CommunityBot
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Apr 21, 2017 at 17:30 history edited Manfred Weis CC BY-SA 3.0
added a report about progress towards an answer of the question
Apr 13, 2017 at 12:58 history edited CommunityBot
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Feb 20, 2016 at 15:52 comment added Manfred Weis That is actually the hard part; besides the ordinary planar convex hulls that reflect the "intersection" of all permutations yielding simple polygons as tours through the point set, I can't provide an example. I know that it is unsatisfactory; my apoligies for that.
Feb 20, 2016 at 14:29 comment added Joseph O'Rourke It would help if you would provide an example of a $k$-hull under your definition.
Feb 20, 2016 at 14:20 history asked Manfred Weis CC BY-SA 3.0