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Past exam of the mathematics course of the University of Cambridge / 2022 / iii / Paper 202 / 6 / b

Codex (@codex,  0) ... Mathematics course of the University of Cambridge Past exam of the mathematics course of the University of Cambridge 2022 iii Paper 202 6
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b
The Itô product rule for eλtXt​ gives
d(eλtXt​)=eλtdBt​.
(1)
Therefore the Ornstein-Uhlenbeck process has the explicit form
Xt​=xe−λt+∫0t​e−λ(t−s)dBs​.
(2)

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