[permalink] [id link]
** Lebesgue covering dimension
from
Wikipedia
Some Related Sentences
** and Lebesgue
** The Vitali theorem on the existence of non-measurable sets which states that there is a subset of the real numbers that is not Lebesgue measurable.
** The Lebesgue measure of a countable disjoint union of measurable sets is equal to the sum of the measures of the individual sets.
** and covering
** Roman Britain or Britannia, a Roman province covering most of modern England and Wales and some of southern Scotland from 43 to 410 AD
** Freight Unit, which is currently developing the " London Freight Plan " and is involved with setting up and supporting a number of Freight Quality Partnerships covering key areas of London.
** A federal grand jury indicts Caspar Weinberger for his role in covering up the Iran – Contra affair.
** Species cirrostratus nebulosus ( Cs neb ): A featureless veil of high cloud covering the entire sky ( C < sub > H </ sub > 7 ).
** City of Adelaide, the South Australian local government area covering the city centre, North Adelaide and the parklands
** Electoral district of Albany, the district of the Western Australian Legislative Council covering Albany
** 6, 000 watts covering 40-45 mile radius of 10 counties in Tennessee, Missouri, & Kentucky since June 2007
** General knowledge – covering the topics listed below ( if they are not in a separate round ) and also topics such as history, geography and science and nature.
** Demos / Demoi, the name for a specific type of subdivision or municipality in modern Greece ; an administrative area covering a city or several villages together
** Journal of the Optical Society of America A, 1984-present, covering research on optics, image science, and vision.
** A double covering group of a topological group such as a Lie group, a group extension of index two formed by a topological double cover.
** and dimension
** the image of the boundary of the closed ball is contained in the union of a finite number of elements of the partition, each having cell dimension less than n.
Lebesgue and covering
The Lebesgue covering dimension is defined as the minimum number of overlaps that small open balls need to have in order to completely cover the object.
Menger showed, in the 1926 construction, that the sponge is a universal curve, in that any possible one-dimensional curve is homeomorphic to a subset of the Menger sponge, where here a curve means any compact metric space of Lebesgue covering dimension one ; this includes trees and graphs with an arbitrary countable number of edges, vertices and closed loops, connected in arbitrary ways.
Lebesgue covering dimension or topological dimension is one of several inequivalent notions of assigning a topological invariant dimension to a given topological space.
* A topological space is zero-dimensional with respect to the Lebesgue covering dimension if every open cover of the space has a refinement which is a cover of the space by open sets such that any point in the space is contained in exactly one open set of this refinement.
0.610 seconds.