it was a conjecture only a few days ago https://terrytao.wordpress.com/2015/09/11/the-erdos-discrepancy-problem-via-the-elliott-conjecture/ https://terrytao.wor

it was a conjecture only a few days ago https://terrytao.wordpress.com/2015/09/11/the-erdos-discrepancy-problem-via-the-elliott-conjecture/ https://terrytao.wordpress.com/2015/09/11/the-erdos-discrepa...