Concept
Apeirogonal antiprism
Concepts associés (4)
Apeirogonal prism
In geometry, an apeirogonal prism or infinite prism is the arithmetic limit of the family of prisms; it can be considered an infinite polyhedron or a tiling of the plane. Thorold Gosset called it a 2-dimensional semi-check, like a single row of a checkerboard. If the sides are squares, it is a uniform tiling. If colored with two sets of alternating squares it is still uniform. File:Infinite prism alternating.svg|Uniform variant with alternate colored square faces. File:Infinite_bipyramid.
Order-2 apeirogonal tiling
In geometry, an order-2 apeirogonal tiling, apeirogonal dihedron, or infinite dihedron is a tiling of the plane consisting of two apeirogons. It may be considered an improper regular tiling of the Euclidean plane, with Schläfli symbol {∞, 2}. Two apeirogons, joined along all their edges, can completely fill the entire plane as an apeirogon is infinite in size and has an interior angle of 180°, which is half of a full 360°. The apeirogonal tiling is the arithmetic limit of the family of dihedra {p, 2}, as p tends to infinity, thereby turning the dihedron into a Euclidean tiling.
Apeirogone
En géométrie, un apeirogone (du "ἄπειρος" apeiros : infini, sans bornes, et "γωνία" gonia : angle) est un polygone généralisé ayant un nombre infini (dénombrable) de côtés. Le plus souvent, le terme désigne un polygone régulier convexe (tous les angles et tous les côtés sont égaux, et les côtés ne se croisent pas) ; il n'existe pas à ce sens d'apeirogone non trivial en géométrie euclidienne, mais il y en a plusieurs familles (non semblables les unes aux autres) en géométrie hyperbolique. H. S. M.
Uniform tiling
In geometry, a uniform tiling is a tessellation of the plane by regular polygon faces with the restriction of being vertex-transitive. Uniform tilings can exist in both the Euclidean plane and hyperbolic plane. Uniform tilings are related to the finite uniform polyhedra which can be considered uniform tilings of the sphere. Most uniform tilings can be made from a Wythoff construction starting with a symmetry group and a singular generator point inside of the fundamental domain.