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Drift rates A(t) (top left) and PMFs (top right) for exponents n from − 0.4 to 0 (dashed), 0.2 to 0.8 (dotted), 1 (solid), and 1.2 to 1.4 (dash-dotted) in steps of 0.2. Here a = 2, C = 1, and m = 1. Other parameters being fixed, all the accuracy curves cross at t = 1. Bottom left: the effect of n on threshold for a = 5, m = 1, and T = 0.2s (dash-dot), T = 0.6s (solid), T = 1.0s (dashed), T = 1.4s (dotted). Bottom right: the corresponding slopes.
