The diameter of the graph of a semiring

Anastase Nakassis
1976 Proceedings of the American Mathematical Society  
In this paper, it is proven that the diameter of the graph of a semiring with more than two elements does not exceed three.
doi:10.1090/s0002-9939-1976-0427162-0 fatcat:pae7onnbvvcjfiz345nhmfkyky