T1 was already known

The theorem I proved in T1 was already known. It was found by Kempe back in 1879 in terms of graph theory (see http://en.wikipedia.org/wiki/Four_color_theorem: “Kempe also showed correctly that G can have no vertex of degree 4″). Only 132 years later … not bad.

People from http://cstheory.stackexchange.com helped me on this (to find that it was already known). See here: http://cstheory.stackexchange.com/questions/5822.

I still think my proof it is of some value, since it is not expressed in terms of graph theory (of the dual graph derived from the map).


About stefanutti

V: "Do you know me?" S: "yes." V: "No you don't." S: "Okay." V: "Did you see my picture in the paper?" S: "Yes." V: "No you didn't." S: "I don't even get the paper."
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