definite+space
21Free space — In classical physics, free space is a concept of electromagnetic theory, corresponding to a theoretically perfect vacuum, and sometimes referred to as the vacuum of free space. The definitions of the ampere and meter SI units are based upon… …
22De Sitter space — In mathematics and physics, n dimensional De Sitter space, denoted dS n, is the Lorentzian analog of an n sphere (with its canonical Riemannian metric). It is a maximally symmetric, Lorentzian manifold with constant positive curvature, and is… …
23Classifying space — In mathematics, specifically in homotopy theory, a classifying space BG of a topological group G is the quotient of a weakly contractible space EG (i.e. a topological space for which all its homotopy groups are trivial) by a free action of G. It… …
24de Sitter space — In mathematics and physics, a de Sitter space is the analog in Minkowski space, or spacetime, of a sphere in ordinary, Euclidean space. The n dimensional de Sitter space , denoted dSn, is the Lorentzian manifold analog of an n sphere (with its… …
25The Space Gamer — was a magazine dedicated to the subject of science fiction and fantasy board games and role playing games. It quickly grew in importance and was an important and influential magazine in its subject matter from the late 70s through the mid 80s.… …
26Energetic space — In mathematics, more precisely in functional analysis, an energetic space is, intuitively, a subspace of a given real Hilbert space equipped with a new energetic inner product. The motivation for the name comes from physics, as in many physical… …
27Royal Space Force: The Wings of Honnêamise — Cover art of the 2007 HD DVD release by Gainax Kanji 王立宇宙軍 オネアミスの翼 …
28Frame of a vector space — This article is about a generalization of bases to linearly dependent sets of vectors. For a linearly independent set of vectors, see k frame. In linear algebra, a frame of a vector space V with an inner product can be seen as a generalization of …
29Spider webs in space — were spun in 1973 aboard Skylab, involving two female European garden spiders (cross spiders) called Arabella and Anita. As part of an experiment, the two spiders were taken into low earth orbit on the Skylab 3 mission. The aim of the experiment… …
30Siegel upper half-space — In mathematics, the Siegel upper half space of degree n is the set of n times; n symmetric matrices over the complex number field whose imaginary part is positive definite. It is named in honor of Carl Ludwig Siegel.In the case n = 1, the Siegel… …
