PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
Viewing Version 4 of 'pairwise disjoint'
[ view 'pairwise disjoint' | back to history ]

Title of object: pairwise disjoint
Canonical Name: MutuallyDisjoint
Type: Definition

Created on: 2004-02-29 03:15:21
Modified on: 2004-05-01 04:15:18

Creator: yark
Modifier: yark
Author: yark
Author: matte

Classification: msc:03E99
Synonyms: pairwise disjoint=mutually disjoint

Revision comment (for changes between this and next version):

correction #12638

Preamble:

\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}

% used for TeXing text within eps files
%\usepackage{psfrag}
% need this for including graphics (\includegraphics)
%\usepackage{graphicx}
% for neatly defining theorems and propositions
%\usepackage{amsthm}
% making logically defined graphics
%\usepackage{xypic}

% there are many more packages, add them here as you need them

% define commands here

\newcommand{\R}{\mathbb{R}}
\newcommand{\C}{\mathbb{C}}
\newcommand{\N}{\mathbb{N}}
\newcommand{\Z}{\mathbb{Z}}

\newcommand*{\norm}[1]{\lVert #1 \rVert}
\newcommand*{\abs}[1]{| #1 |}

\def\emptyset{\varnothing}
Content:

{\bf Definition}
Suppose $\{ E_\alpha\mid \alpha \in I \}$ is an arbitrary
collection of sets. Then these sets are \emph{pairwise disjoint} if
for distinct $\alpha,\beta$ in $I$, we have $E_\alpha \cap E_\beta= \emptyset$.

\subsubsection*{Remark}
The synonym \emph{mutually disjoint} is also used.