Wikipedia foundation.
Horoball — In mathematics, particularly hyperbolic geometry, a horoball is a specific kind of n dimensional object in hyperbolic n space. Consider the upper half space model of hyperbolic space. Then a horosphere is given by a horizontal plane, and the… … Wikipedia
Non-Euclidean geometry — Behavior of lines with a common perpendicular in each of the three types of geometry Non Euclidean geometry is the term used to refer to two specific geometries which are, loosely speaking, obtained by negating the Euclidean parallel postulate,… … Wikipedia
Glossary of Riemannian and metric geometry — This is a glossary of some terms used in Riemannian geometry and metric geometry mdash; it doesn t cover the terminology of differential topology. The following articles may also be useful. These either contain specialised vocabulary or provide… … Wikipedia
Anosov diffeomorphism — In mathematics, more particularly in the fields of dynamical systems and geometric topology, an Anosov map on a manifold M is a certain type of mapping, from M to itself, with rather clearly marked local directions of expansion and contraction .… … Wikipedia
Horocycle — A blue horocycle in the Poincaré disk model and some red normals. The normals converge asymptotically to the upper central point. In hyperbolic geometry, a horocycle (Greek: όριο + κύκλος border + circle) is a curve whose normals all converge… … Wikipedia
Lexique de la géométrie riemannienne — La géométrie riemannienne est un domaine des mathématiques étudiant les propriétés des variétés riemanniennes. Cette page rappelle brièvement les définitions des termes récurrents rencontrés. Sommaire : Haut A B C D E F G H I J K L M N O P Q … Wikipédia en Français
horoball — noun A horosphere together with the space above it … Wiktionary
horospherical — adjective Of or pertaining to a horosphere … Wiktionary
Horobola — Este artículo o sección necesita referencias que aparezcan en una publicación acreditada, como revistas especializadas, monografías, prensa diaria o páginas de Internet fidedignas. Puedes añadirlas así o avisar al autor prin … Wikipedia Español
horo- — ♦ Élément, du gr. hôro , de hôra « heure ». I. ⇒HORO 1, élém. formant Élém. tiré du gr. , de « heure », entrant dans la formation de qq. subst. et adj., dans différents domaines : horodateur, horo dateur, trice, subst. masc. et adj. « (Appareil)… … Encyclopédie Universelle
