![File:DeMorganFourColour.png](https://upload.wikimedia.org/wikipedia/commons/thumb/7/72/DeMorganFourColour.png/556px-DeMorganFourColour.png)
Size of this preview: 556 × 599 pixels. Other resolutions: 223 × 240 pixels | 445 × 480 pixels | 713 × 768 pixels | 1,107 × 1,193 pixels.
Original file (1,107 × 1,193 pixels, file size: 264 KB, MIME type: image/png)
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 00:08, 19 June 2012 | ![]() | 1,107 × 1,193 (264 KB) | Snorri95 | Extract from De Morgan's original letter to Hamilton about the four colour conjecture, October 23 1852. Trinity College, Dublin. |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on ca.wikipedia.org
- Usage on id.wikipedia.org
- Usage on sq.wikipedia.org
- Usage on zh.wikipedia.org