Arcsine laws (Wiener process)
= Arcsine laws (Wiener process)
{wiki=Arcsine_laws_(Wiener_process)}
The arcsine law is a probability distribution that arises in the context of Brownian motion (or Wiener process). Specifically, it pertains to the distribution of the time at which a Brownian motion process spends a certain amount of time above or below a given level, typically the mean or a specific threshold.