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Dimension results related to the St. Petersburg game

Kern P., Wedrich L.

Probability and Mathematical Statistics

2014

Vol. 34, Fasc. 1

97--117

Let Sn be the total gain in n repeated St. Petersburg games. It is known that n−1(Sn − n log2 n) converges in distribution along certain geometrically increasing subsequences and its possible limiting random variables can be parametrized as Y (t) with t ∈ [1/2, 1]. We determine the Hausdorff and box-counting dimension of the range and the graph for almost all sample paths of the stochastic process {Y(t)}t∈[1/2, 1]. The results are compared to the fractal dimension of the corresponding limiting objects when gains are given by a deterministic sequence initiated by Hugo Steinhaus.