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Oct 31, 2020 at 23:35 comment added Mateusz Kwaśnicki Some minor comments: 1. The integrand $x^2$ is missing under the integral in (c). 2. No need to invoke martingales, Kolmogorov's three-series theorem is enough. 3. Formula (j) in fact defines $\mu^{*s}$ for an arbitrary real $s > 0$ if $1/n$ is replaced by $s$.
Oct 31, 2020 at 16:12 history edited 0xbadf00d CC BY-SA 4.0
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Oct 31, 2020 at 11:13 history answered 0xbadf00d CC BY-SA 4.0