2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/115589We show that for the voter model on $\{0,1\}^{\mathbb{Z}}$ corresponding to a random walk with kernel $p(\cdot)$ and starting from unanimity to the right and opposing unanimity to the left, a tight interface between 0's and 1's exists if $p(\cdot)$ has finite second moment but does not if $p(\cdot)$ fails to have finite moment of order $α$ for some $α<2$.20 pagesProbability60G60; 60G17; 60G15text