Gleason's theorem: Difference between revisions

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In [[mathematics]], the '''''ε''-neighborhood''' (or '''epsilon-neighborhood''') of a [[set (mathematics)|set]] ''A''&nbsp;⊆&nbsp;''M'', where (''M'',&nbsp;''d'') is a [[metric space]], is the set of all points of ''M'' whose distance to some point of ''A'' is less than ''ε''&nbsp;&gt;&nbsp;0.<ref name=Barile>{{cite web|last=Barile, Margherita and Weisstein, Eric W.|title=Neighborhood|url=http://mathworld.wolfram.com/Neighborhood.html|publisher=MathWorld|accessdate=21 September 2013}}</ref>  It is customarily denoted by ''A''<sup>''ε''</sup>. One may write
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:<math>A^{\varepsilon} := \{ p \in M | \exists q \in A \mathrm{\,s.t.\,} d(p, q) < \varepsilon \} = \bigcup_{p \in A} B_{\varepsilon} (p)</math>
 
where ''B''<sub>''ε''</sub>(''p'') is the [[open ball]] of radius ''ε'' centered at a point ''p'' of ''M''.
 
==References==
{{reflist}}
 
{{DEFAULTSORT:Epsilon-Neighborhood}}
[[Category:General topology]]
[[Category:Metric geometry]]

Latest revision as of 14:34, 8 January 2015

Andrew Berryhill is what his spouse enjoys to contact him and he totally digs that name. Mississippi is where her house is but her spouse wants them to move. He is an info officer. What me and my family members adore is to climb but I'm thinking on starting something new.

my weblog: clairvoyance (1.234.36.240)