The first-passage area of Ornstein-Uhlenbeck process revisited
Mario Abundo
Abstract
Mario Abundo
Abstract
For Ornstein-Uhlenbeck process X(t), starting from X(0)=x>0, we highlight some results about the first-passage time of X(t) through zero and its first-passage area, that is the random area swept out by X(t), till its first-passage through zero. We study single and joint moments of the first-passage time and first-passage area, and their behaviors, as x→0+ and x→+∞; moreover, we investigate the expected value of the time average of X(t) till the FPT, and the maximum displacement of X(t).
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For Ornstein-Uhlenbeck process X(t), starting from X(0)=x>0, we highlight some results about the first-passage time of X(t) through zero and its first-passage area, that is the random area swept out by X(t), till its first-passage through zero. We study single and joint moments of the first-passage time and first-passage area, and their behaviors, as x→0+ and x→+∞; moreover, we investigate the expected value of the time average of X(t) till the FPT, and the maximum displacement of X(t).
Key concepts: Ornstein–Uhlenbeck process, Mathematics, First-hitting-time model, Zero (linguistics), Stochastic process, Combinatorics, Mathematical analysis, Statistics