- multiply-connected plane
- мат. многосвязная плоскость
Большой англо-русский и русско-английский словарь. 2001.
Большой англо-русский и русско-английский словарь. 2001.
Simply connected space — In topology, a topological space is called simply connected (or 1 connected) if it is path connected and every path between two points can be continuously transformed, staying within the space, into any other path while preserving the two… … Wikipedia
Covering space — A covering map satisfies the local triviality condition. Intuitively, such maps locally project a stack of pancakes above an open region, U, onto U. In mathematics, more specifically algebraic topology, a covering map is a continuous surjective… … Wikipedia
Eigenplane — In mathematics, an eigenplane is a two dimensional invariant subspace in a given vector space. By analogy with the term eigenvector for a vector which, when operated on by a linear operator is another vector which is a scalar multiple of itself,… … Wikipedia
number game — Introduction any of various puzzles and games that involve aspects of mathematics. Mathematical recreations comprise puzzles and games that vary from naive amusements to sophisticated problems, some of which have never been solved.… … Universalium
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Holyhedron — In mathematics, a holyhedron is a type of 3 dimensional geometric body: a polyhedron each of whose faces contains at least one polygon shaped hole, and whose holes boundaries share no point with each other or the face s boundary.The concept was… … Wikipedia
Superfluid film — Superfluidity and superconductivity are of inherent interest because they are macroscopic manifestations of quantum mechanics. There is a considerable amount of interest, both theoretical and practical, in these quantum phase transitions. There… … Wikipedia
Universe — For other uses, see Universe (disambiguation). Physical cosmology … Wikipedia
Shape of the Universe — Edge of the Universe redirects here. For the Bee Gees song, see Edge of the Universe (song). The local geometry of the universe is determined by whether Omega is less than, equal to or greater than 1. From top to bottom: a spherical universe, a… … Wikipedia
Aharonov-Bohm effect — The Aharonov Bohm effect, sometimes called the Ehrenberg Siday Aharonov Bohm effect, is a quantum mechanical phenomenon by which a charged particle is affected by electromagnetic fields in regions from which the particle is excluded. Werner… … Wikipedia
Potential theory — may be defined as the study of harmonic functions. Definition and comments The term potential theory arises from the fact that, in 19th century physics, the fundamental forces of nature were believed to be derived from potentials which satisfied… … Wikipedia