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Viewing Version 2 of 'point'
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Title of object: point
Canonical Name: Point
Type: Definition

Created on: 2006-07-24 20:35:10
Modified on: 2006-07-24 21:40:58

Creator: Wkbj79
Modifier: Wkbj79
Author: CWoo
Author: Wkbj79

Classification: msc:51-00, msc:54-00, msc:15-00

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

Added link for incidence geometry.
Italicized ``point'' in second sentence.

Preamble:

% this is the default PlanetMath preamble. as your knowledge
% of TeX increases, you will probably want to edit this, but
% it should be fine as is for beginners.

% almost certainly you want these
\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
Content:

In a vector space, an affine space, or more generally an incidence geoemtry, a {\sl point\/} is a \PMlinkname{zero}{Zero} \PMlinkname{dimensional}{Dimension3} \PMlinkescapetext{object}.

In a projective geometry, a point is a one-dimensional subspace.

In a topology, a {\sl point\/} is an element of a topological space.