real line

См. также в других словарях:

• Real line — In mathematics, the real line is simply the set R of singleton real numbers.However, this term is usually used when R is to be treated as a space of some sort, such as a topological space or a vector space.The real line has been studied at least… …   Wikipedia

• real line — noun The real number system, viewed as a line. Syn: real number line …   Wiktionary

• real line — /ree euhl, reel/, Math. 1. See number line. 2. the real axis in the complex plane. * * * n. Mathematics a notional line in which every real number is conceived of as represented by a point …   Useful english dictionary

• real line — /ree euhl, reel/, Math. 1. See number line. 2. the real axis in the complex plane. * * * …   Universalium

• Set theory of the real line — is an area of mathematics concerned with the application of set theory to aspects of the real numbers. For example, one knows that all countable sets of reals are null, i.e. have Lebesgue measure 0; one might therefore ask the least possible size …   Wikipedia

• Real number — For the real numbers used in descriptive set theory, see Baire space (set theory). For the computing datatype, see Floating point number. A symbol of the set of real numbers …   Wikipedia

• Line bundle — In mathematics, a line bundle expresses the concept of a line that varies from point to point of a space. For example a curve in the plane having a tangent line at each point determines a varying line: the tangent bundle is a way of organising… …   Wikipedia

• Real projective line — In real analysis, the real projective line (also called the one point compactification of the real line, or the projectively extended real numbers ), is the set mathbb{R}cup{infty}, also denoted by widehat{mathbb{R and by mathbb{R}P^1.The symbol… …   Wikipedia

• Line engraving — This article currently covers the history of line engraving until ca. 1910. Please extend it as needed, and remove this notice afterwards. Line engraving is a term for engraved images printed on paper to be used as prints or illustrations. The… …   Wikipedia

• Line (geometry) — Three lines the red and blue lines have the same slope, while the red and green ones have same y intercept …   Wikipedia

• Real matrices (2 x 2) — The 2 x 2 real matrices are the linear mappings of the Cartesian coordinate system into itself by the rule:(x,y) mapsto (x,y)egin{pmatrix}a c b dend{pmatrix} = (ax + by, cx + dy).The set of all such real matrices is denoted by M(2,R). Two… …   Wikipedia