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The Utilities Problem and Solution

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Uploaded on Jul 17, 2009

The utilities problem: can I connect the gas, the electric and the water to three houses without crossing a line. Made in response to Ericsurf6 video, with some proper maths in it.

Eric's original video http://www.youtube.com/watch?v=WyQqY_...

Instructions to make that pop-up octahedron http://singingbanana.com/popupoctahed...

Wikipedia on Planar graphs (what we want but don't have) http://en.wikipedia.org/wiki/Planar_g...

Planarity: untangle the planar graphs http://planarity.net/#

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