twisted sphere
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Twisted K-theory — In mathematics, twisted K theory (also called K theory with local coefficients ) is a variation on K theory, a mathematical theory from the 1950s that spans algebraic topology, abstract algebra and operator theory. More specifically, twisted K… … Wikipedia
Exotic sphere — In differential topology, a mathematical discipline, an exotic sphere is a differentiable manifold M that is homeomorphic but not diffeomorphic to the standard Euclidean n sphere. That is, M is a sphere from the point of view of all its… … Wikipedia
Oblique sphere — Oblique Ob*lique , a. [F., fr. L. obliquus; ob (see {Ob }) + liquis oblique; cf. licinus bent upward, Gr. le chrios slanting.] [Written also {oblike}.] [1913 Webster] 1. Not erect or perpendicular; neither parallel to, nor at right angles from,… … The Collaborative International Dictionary of English
Clutching construction — In topology, a branch of mathematics, the clutching construction is a way of constructing fiber bundles, particularly vector bundles on spheres. Contents 1 Definition 1.1 Generalization 1.2 Classifying map construction … Wikipedia
Orbifold — This terminology should not be blamed on me. It was obtained by a democratic process in my course of 1976 77. An orbifold is something with many folds; unfortunately, the word “manifold” already has a different definition. I tried “foldamani”,… … Wikipedia
Michael Atiyah — Sir Michael Atiyah Born 22 April 1929 (1929 04 22) (age 82) … Wikipedia
Fiber bundle — In mathematics, in particular in topology, a fiber bundle (or fibre bundle) is a space which looks locally like a product space. It may have a different global topological structure in that the space as a whole may not be homeomorphic to a… … Wikipedia
Phyrexia — is one of several fictional featured in the storyline and cards from the trading card game . It is often called the final Hell for artifacts , or simply The Nine Hells . Geography Phyrexia is an artificial plane formed from nine hollow spheres,… … Wikipedia
Paradiso (Dante) — For other uses, see Paradiso. Dante and Beatrice speak to the teachers of wisdom Thomas Aquinas, Albertus Magnus, Peter Lombard and Sigier of Brabant in the Sphere of the Sun (fresco by Philipp Veit), Canto 10 … Wikipedia
Dôme géodésique — Géode Pour les articles homonymes, voir Géode (homonymie). La Biosphère construite à Montréal pour l Expositi … Wikipédia en Français
ancient Greek civilization — ▪ historical region, Eurasia Introduction the period following Mycenaean civilization, which ended in about 1200 BC, to the death of Alexander the Great, in 323 BC. It was a period of political, philosophical, artistic, and scientific… … Universalium
