2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66849First exit times from regions and their dependence on variations of boundaries are discussed for diffusion processes. The paper presents an estimate of $L_1$-distance between exit times from two regions via expectations of exit times.3 pagesProbabilityAnalysis of PDEs60G17, 60G40, 60J50, 60J60, 60J65On $L_1$-distance between first exit times from two regionstext