0 votes 0 votes I read in https://gateoverflow.in/28955/given-vertex-edges-how-find-non-isomorphic-graphs-possible question explanantion,it was written that e=2n-3 where e= number of edges and n is no of vertices. how is it derived??can anyone tell me the source?? Graph Theory graph-theory engineering-mathematics + – Akriti sood asked Dec 24, 2016 Akriti sood 157 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.