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Quick math question: if you constrain a random walk so that the system does not respond to impulses in all but a tiny pizza slice, the distance from origin should grow in the slice direction linearly in number of steps, right? n instead of sqrt(n)?
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So unconstrained is symmetric random walk with steps +1,-1, probability 1/2 each direction, how exactly do you constrain it? The pizza is in space/time? Can you provide more details?
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