An Improvement of Strassen's Invariance Principle
Major, P.
Ann. Probab., Tome 7 (1979) no. 6, p. 55-61 / Harvested from Project Euclid
Let a distribution function $F(x), \int xdF(x) = 0, \int x^2dF(x) = 1$ be given. Strassen constructed two sequences $X_1, X_2, \ldots$ and $Y_1, Y_2, \ldots$ of independent, identically distributed random variables, the $X_i$ with distribution function $F(x)$ and the $Y_i$ with standard normal distribution, in such a way that the partial sums $S_n = \sum^n_{i = 1}X_i$ and $T_n = \sum^n_{i = 1} Y_i$ satisfy the relation $|S_n - T_n| = O((n \log \log n)^\frac{1}{2})$ with probability 1. Earlier we proved that this result cannot be improved. Now we show however that an approximation $|S_n - T_n| = O(n^\frac{1}{2})$ can be achieved, if the $Y_i$ are independent normal variables whose variances are appropriately chosen.
Publié le : 1979-02-14
Classification:  Invariance principle,  sums of independent random variables,  60G50,  60B10
@article{1176995147,
     author = {Major, P.},
     title = {An Improvement of Strassen's Invariance Principle},
     journal = {Ann. Probab.},
     volume = {7},
     number = {6},
     year = {1979},
     pages = { 55-61},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1176995147}
}
Major, P. An Improvement of Strassen's Invariance Principle. Ann. Probab., Tome 7 (1979) no. 6, pp.  55-61. http://gdmltest.u-ga.fr/item/1176995147/