On Barbier's theorem
W. Cieslak, S. Gozdz (1990)
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W. Cieslak, S. Gozdz (1990)
Matematički Vesnik
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Annales Polonici Mathematici
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E. Ossanna (1992)
Rendiconti del Seminario Matematico della Università di Padova
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Colding, Tobias H., Kleiner, Bruce (2003)
Electronic Research Announcements of the American Mathematical Society [electronic only]
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R. G., Bose (1932)
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Wolfgang Weil, Paul Goodey (1987)
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Lohkamp, Joachim (1998)
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Brent Collins (2001)
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Xu-Jia Wang (2014)
Journal of the European Mathematical Society
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The convexity of level sets of solutions to the mean curvature equation is a long standing open problem. In this paper we give a counterexample to it.
Rolf Schneider (1990)
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Yves Martinez-Maure (2012)
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The classical Minkowski problem has a natural extension to hedgehogs, that is to Minkowski differences of closed convex hypersurfaces. This extended Minkowski problem is much more difficult since it essentially boils down to the question of solutions of certain Monge-Ampère equations of mixed type on the unit sphere of ℝn+1. In this paper, we mainly consider the uniqueness question and give first results.