How do we find out the rate of decay of the series \[ \sum_{j}(|a_{j} - T| + 1)^{-q} |a_{j}|^{-1} \] as $T \to \infty$?
Suppose that $q > 0$ and \[ \sum_{j}|a_{j}|^{-1 - \epsilon} < \infty. \]
Any idea? Can we maybe analyze the sum case just by rewriting it as a suitable form?
Thanks for reading.