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Re:Divisibility by 7 is a Walk on a Graph (2009) by hcarvalhoalves on Sunday November 08, 2015 @10:52PM (#10531290)
50 years from now this will be called "drfuchs last theorem"
Re:Divisibility by 7 is a Walk on a Graph (2009) by newsignup on Sunday November 08, 2015 @11:17PM (#10531353)
with the scribble "but it took decades for me to realize why it obviously works" somewhere in the margins and stating that there wasn't enough room to write that down though..