brownian

framework. Introduction to Brownian Motion What is Brownian Motion? Brownian motion, named after the botanist Robert Brown, describes the random, erratic motion of particles suspended in a fluid. Mathematically, it is modeled as a continuo

ifically, for a Brownian filtration, every martingale \( M_t \) admits a representation: \[ M_t = M_0 + \int_0^t \phi_s \, dB_s \] where \( \phi_s \) is an adapted process satisfying integrability conditions.