A nonconventional strong law of large numbers and fractal dimensions of some multiple recurrence sets
Kifer, Yuri
Original · EN
We provide conditions which yield a strong law of large numbers for expressions of the form 1/N∑ₙ₌₁ⁿF(X(q₁(n)),..., X(qℓ(n))) where X(n),n≥ 0's is a sufficiently fast mixing vector process with some moment conditions and stationarity properties, F is a continuous function with polinomial growth and certain regularity properties and qᵢ,i>m are positive functions taking on integer values on integers with some growth conditions. Applying these results we study certain multifractal formalism type questions concerning Hausdorff dimensions of some sets of numbers with prescribed asymptotic frequencies of combinations of digits at places q₁(n),...,qℓ(n).
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