- element of a covering
- торец
Англо-русский технический словарь.
element of a covering
Смотреть что такое "element of a covering" в других словарях:
Covering group — This article is about topological covering group. For algebraic covering group, see universal perfect central extension. In mathematics, a covering group of a topological group H is a covering space G of H such that G is a topological group and… … Wikipedia
Covering graph — In the mathematical discipline of graph theory, a graph C is a covering graph of another graph G if there is a covering map from the vertex set of C to the vertex set of G. A covering map f is a surjection and a local isomorphism: the… … Wikipedia
Covering relation — For other uses of Cover in mathematics, see Cover (mathematics). The Hasse diagram of the power set of three elements, partially ordered by inclusion. In mathematics, especially order theory, the covering relation of a partially ordered set is… … Wikipedia
Covering (graph theory) — In the mathematical discipline of graph theory, a covering (or cover) of a graph is a set of vertices (or edges) such that each edge (vertex) of the graph touches (is incident with) at least one element of the set.It is of mathematical interest… … Wikipedia
Element Lad — Superherobox| caption= character name=Element Lad real name=Jan Arrah publisher=DC Comics debut= Adventure Comics # 307 (April 1963) creators= Edmond Hamilton John Forte homeworld= Trom species= alliances=Legion of Super Heroes aliases=Mystery… … Wikipedia
chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… … Universalium
rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium
First Ostend Raid — Infobox Military Conflict conflict=First Ostend Raid partof=North Sea Operations, First World War caption=Wreckage of HMS Brilliant at Ostend date=23–24 April 1918 place=Ostend, Belgium result=German defences drove off British attackers.… … 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
United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… … Universalium
Lorentz group — Group theory Group theory … Wikipedia
