画像:Trefoil knot rp.png

出典: フリー百科事典『ウィキペディア（Wikipedia）』

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Trefoil_knot_rp.png‎ (200 × 200 pixel, file size: 8 キロバイト, MIME type: image/png)

このファイルはウィキメディア・コモンズから呼び出されたものです。
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ウィキメディア・コモンズの記述

[edit] Summary

Description	This picture shows the regular presentation of trefoil knot. The knot is a basic example of nontrivial knot in knot theory (mathematics). The regular representation, commonly used in the theory to indicate knots, represents projection onto 2-dimensional plane of the knot. At each intersection, the below string is split a bit to indicate how the strings are arranged at that point.
Source	Own work
Date	2006-09-16
Author	YAMASHITA Makoto I'm contributing math graphics. My account at Japanese Wikipedia: ja:User:Makotoy.
Permission	See below

[edit] Licensing

I, the author of this work, hereby publish it under the following licenses:

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".