horodisk

English

Noun

horodisk (plural horodisks)

(geometry) A horocyclic disk
- 2015, José M. Espinar, Alberto Farina, Laurent Mazet, “ ${\\displaystyle f}$ -extremal domains in hyperbolic space”, in arXiv‎:
  In this paper we study the geometry and the topology of unbounded domains in the Hyperbolic Space ${\\displaystyle \\mathbb {H} ^{n}}$ supporting a bounded positive solution to an overdetermined elliptic problem. Under suitable conditions on the elliptic problem and the behaviour of the bounded solution at infinity, we are able to show that symmetries of the boundary at infinity imply symmetries on the domain itself. In dimension two, we can strengthen our results proving that a connected domain ${\\displaystyle \\Omega \\subset \\mathbb {H} ^{2}}$ with ${\\displaystyle C^{2}}$ boundary whose complement is connected and supports a bounded positive solution ${\\displaystyle u}$ to an overdetermined problem, assuming natural conditions on the equation and the behaviour at infinity of the solution, must be either a geodesic ball or, a horodisk or, a half-space determined by a complete equidistant curve or, the complement of any of the above example.

Anagrams

Koordish

单词	horodisk
释义	horodisk English Noun horodisk (plural horodisks) (geometry) A horocyclic disk 2015, José M. Espinar, Alberto Farina, Laurent Mazet, “ ${\\displaystyle f}$ -extremal domains in hyperbolic space”, in arXiv‎: In this paper we study the geometry and the topology of unbounded domains in the Hyperbolic Space ${\\displaystyle \\mathbb {H} ^{n}}$ supporting a bounded positive solution to an overdetermined elliptic problem. Under suitable conditions on the elliptic problem and the behaviour of the bounded solution at infinity, we are able to show that symmetries of the boundary at infinity imply symmetries on the domain itself. In dimension two, we can strengthen our results proving that a connected domain ${\\displaystyle \\Omega \\subset \\mathbb {H} ^{2}}$ with ${\\displaystyle C^{2}}$ boundary whose complement is connected and supports a bounded positive solution ${\\displaystyle u}$ to an overdetermined problem, assuming natural conditions on the equation and the behaviour at infinity of the solution, must be either a geodesic ball or, a horodisk or, a half-space determined by a complete equidistant curve or, the complement of any of the above example. Anagrams Koordish
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