real closure
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Real closed field — In mathematics, a real closed field is a field F in which any of the following equivalent conditions are true:#There is a total order on F making it an ordered field such that, in this ordering, every positive element of F is a square in F and… … Wikipedia
Closure (mathematics) — For other uses, see Closure (disambiguation). In mathematics, a set is said to be closed under some operation if performance of that operation on members of the set always produces a unique member of the same set. For example, the real numbers… … Wikipedia
Closure operator — In mathematics, a closure operator on a set S is a function cl: P(S) → P(S) from the power set of S to itself which satisfies the following conditions for all sets X,Y ⊆ S. X ⊆ cl(X) (cl is extensive) X ⊆ Y implies cl(X) ⊆ cl(Y) (cl… … Wikipedia
Closure (topology) — For other uses, see Closure (disambiguation). In mathematics, the closure of a subset S in a topological space consists of all points in S plus the limit points of S. Intuitively, these are all the points that are near S. A point which is in the… … Wikipedia
Real structure — In mathematics, several different mathematical objects have a notion of what a real structure on them is. Real structure of a Vector Space A real structure on a complex vector space V is an antilinear involution sigma: V o V. A real structure… … Wikipedia
Closure phase — The closure phase is an observable quantity in imaging astronomical interferometry, which allowed the use of interferometry with very long baselines. It forms the basis of the self calibration approach to interferometric imaging. The observable… … Wikipedia
real socialism — With the non applicability of the terms socialism and communism , given the divergence of the reality of Soviet socialism from the ideal as interpreted within the corpus of the Marxist Leninist classics, an alternative term was required.… … Dictionary of sociology
real estate closing — closing closing n. 1. the act of closing something. Syn: shutting. [WordNet 1.5] 2. the last section of a communication. Syn: conclusion, close, ending. [WordNet 1.5] 3. termination of operations. Syn: closure, closedown, shutdown. [WordNet 1.5]… … The Collaborative International Dictionary of English
Algebraic closure — In mathematics, particularly abstract algebra, an algebraic closure of a field K is an algebraic extension of K that is algebraically closed. It is one of many closures in mathematics.Using Zorn s lemma, it can be shown that every field has an… … Wikipedia
Close, Closed, Closure — סגר ﺇﻏﻼﻖ Close, Closed, Closure Najwa Sultan in Close, Closed, Closure. Directed by Ram Loevy … Wikipedia
Puerto Real — Spanish city image skyline size = image skyline caption = native name = Puerto Real spanish name = Puerto Real nickname = city motto = city motto means = image skyline size = image skyline caption = native name = Puerto Real spanish name = Puerto … Wikipedia
