- theory of retracts
- мат.теория ретрактов
English-Russian scientific dictionary. 2008.
theory of retracts
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Morse theory — Morse function redirects here. In another context, a Morse function can also mean an anharmonic oscillator: see Morse potential In differential topology, the techniques of Morse theory give a very direct way of analyzing the topology of a… … Wikipedia
Retract (group theory) — In mathematics, in the field of group theory, a subgroup of a group is termed a retract if there is an endomorphism of the group that maps surjectively to the subgroup and is identity on the subgroup. In symbols, H is a retract of G if and only… … Wikipedia
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Karol Borsuk — Nacimiento 8 de mayo de 1905 Polonia … Wikipedia Español
Median graph — The median of three vertices in a median graph In mathematics, and more specifically graph theory, a median graph is an undirected graph in which any three vertices a, b, and c have a unique median: a vertex m(a,b,c) that belongs to shortest… … Wikipedia
Deformation retract — Retract redirects here. For other meanings including concepts in group theory and category theory, see Retraction (disambiguation). In topology, a branch of mathematics, a retraction [1], as the name suggests, retracts an entire space into a… … Wikipedia
Cyclic order — In mathematics, a cyclic order is a way to arrange a set of objects in a circle.[nb] Unlike most structures in order theory, a cyclic order cannot be modeled as a binary relation a < b . One does not say that east is more clockwise than west.… … Wikipedia
Grafo mediano — El mediano de tres vértices en un grafo mediano. En matemática, y más específicamente en la teoría de grafos, un grafo mediano es un grafo no dirigido en que cualesquiera tres vértices a, b, y c tienen un único mediano. Un mediano es un vértice… … Wikipedia Español
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Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… … Medical dictionary
Emotivism — (also known as the hurrah/boo theory) is the meta ethical view which claims that: # Ethical sentences do not express propositions. # Instead, ethical sentences express emotional attitudes. [Garner and Rosen, Moral Philosophy , chapter 13 (… … Wikipedia
