Talk:Itô diffusion

In

$\tau _{U}=\inf\{t\geq 0\ :\ X_{t}\not \in U\}$

it is not clear what $X_{t}\not \in U$ means since U is not a set but a sequence. — Preceding unsigned comment added by Leboudec (talk • contribs) 08:48, 9 November 2021 (UTC)