Most recent change of Torus
Edit made on January 16, 2009 by RiderOfGiraffes at 13:34:08
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What mathematicians call the shape like a doughnut.
The plural of Torus is Tori (a good scrabble word).
The Four Colour Theorem has its equivalent on the torus. Maps on the torus may require as many as, but never require more than, 7 colours.