Question: Let X t , t = 0,1, ... , be a non-negative martingale, M t = max kt X k . Show that for any

Let X_t , t = 0,1, ... , be a non-negative martingale, M_t = max_k≤t X_k. Show that for any t and x > 0, Let Xt , t = 0,1, ... , be a non-negative martingale,

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