: Mathématiques: ideal polyhedron

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ideal polyhedron

In three-dimensional hyperbolic geometry, an ideal polyhedron is a convex polyhedron all of whose vertices are ideal points, points "at infinity" rather than interior to three-dimensional hyperbolic space. It can be defined as the convex hull of a finite set of ideal points. An ideal polyhedron has ideal polygons as its faces, meeting along lines of the hyperbolic space.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Ideal_polyhedron)

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