**Antipodal point** — Antipodal points on a circle are 180 degrees apart. For the geographical antipodal point of a place on the Earth, see antipodes. In mathematics, the antipodal point of a point on the surface of a sphere is the point which is diametrically… … Wikipedia

**antipodal** — I. adjective Date: 1646 1. of or relating to the antipodes; specifically situated at the opposite side of the earth or moon < an antipodal meridian > < an antipodal continent > 2. diametrically opposite < an antipodal point on a sphere > 3.… … New Collegiate Dictionary

**antipodal** — antipodal, ale, aux [ɑ̃tipɔdal, o] adj. ÉTYM. 1752, Trévoux; de antipode. ❖ ♦ Didact. Qui est situé aux antipodes. || Point antipodal … Encyclopédie Universelle

**Point antipodal** — Sur la surface d une sphère, deux points antipodaux sont deux points diamétralement opposés. Un point antipodal est souvent appelé un antipode. Sommaire 1 Étymologie 2 Sur la Terre 3 En mathématiques … Wikipédia en Français

**Point reflection** — In geometry, a point reflection is a type of isometry of Euclidean space. It is a reflection whose mirror is a single point. An object that is invariant under a point reflection is said to possess point symmetry.In two dimensions, a point… … Wikipedia

**antipodal cells** — Three cells of the embryo sac in angiosperms, found at the end of the embryo away from the point of entry of the pollen tube … Dictionary of molecular biology

**Brouwer's fixed point theorem** — ▪ topology in mathematics, a theorem of algebraic topology (topology) that was stated and proved in 1912 by the Dutch mathematician L.E.J. Brouwer (Brouwer, Luitzen Egbertus Jan). Inspired by earlier work of the French mathematician Henri… … Universalium

**Antipodes** — For other uses, see Antipode (disambiguation). This map shows the antipodes of each point on the Earth s surface – the points where the blue and yellow overlap are land antipodes most land has its antipodes in the ocean. This map uses the Lambert … Wikipedia

**Charts on SO(3)** — In mathematics, the special orthogonal group in three dimensions, otherwise known as the rotation group SO(3), is a naturally occurring example of a manifold. The various charts on SO(3) set up rival coordinate systems: in this case there cannot… … Wikipedia

**Projective space** — In mathematics a projective space is a set of elements constructed from a vector space such that a distinct element of the projective space consists of all non zero vectors which are equal up to a multiplication by a non zero scalar. A formal… … Wikipedia