Image:7x-torus.svg
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7x-torus.svg (SVG file, nominally 423 × 423 pixels, file size: 4 KB)
| This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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| Description |
A partition of the torus into seven mutually adjacent regions, requiring seven colors. The torus is shown unrolled onto a square; points on the top edge of the square should be thought of as connected to the corresponding points on the bottom edge of the square, and points on the left edge of the square should be thought of as connected to the corresponding points on the right edge of the square. The edges and vertices of the regions form an embedding of the en:Heawood graph onto the torus. A combinatorially equivalent partition of the torus into regions forms the set of faces of the en:Szilassi polyhedron.
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| Source |
Originally from en.wikipedia; description page is/was here. |
| Date |
2006-12-07 (original upload date) |
| Author |
Original uploader was David Eppstein at en.wikipedia |
| Permission (Reusing this image) |
Released into the public domain (by the author). |
[edit] License information
 |
This image has been (or is hereby) released into the public domain by its author, David Eppstein at the wikipedia project. This applies worldwide. In case this is not legally possible: |
[edit] Original upload log
(All user names refer to en.wikipedia)
- 2006-12-07 07:30 David Eppstein 256×256×0 (3809 bytes) A partition of the torus into seven mutually adjacent regions, requiring seven colors. The torus is shown unrolled onto a square; points on the top edge of the square should be thought of as connected to the corresponding points on the bottom edge of the
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 22:16, 24 July 2007 | 423×423 (4 KB) | David Eppstein | (Expand entities and fix svg header (why was this working before on WP??)) |
| 22:13, 24 July 2007 | 256×256 (4 KB) | David Eppstein | ({{Information |Description=A partition of the torus into seven mutually adjacent regions, requiring seven colors. The torus is shown unrolled onto a square; points on the top edge of the square should be thought of as connected to the corresponding points) |
