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{{Information |Description=Four utilities (water, gas, electricity and internet) are to be directly connected to four houses on a torus without any connections crossing, as drawn by CMG Lee based on http://researchgate.net/figure/A-self-dual-embedding-of-K4-4-in-the-torus_fig1_329708272 . |Source={{own}} |Date= |Author= Cmglee |Permission= |other_versions={{3 utilities problem}} }} Category:Three utilities problem
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Short title
4 utilities problem torus
Image title
Four utilities (aqua, butane, current and data) are to be directly connected to four houses on a torus without any connections crossing, as drawn by CMG Lee based on http://math.stackexchange.com/a/603169 .
