On the fractional parts of the natural powers of a fixed number |
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Authors: | Arturas Dubickas |
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Affiliation: | (1) Vilnius University, Vilnius, Lithuania |
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Abstract: | Let ξ ≠ = 0 and α > 1 be reals. We prove that the fractional parts {ξ αn}, n = 1, 2, 3, ..., take every value only finitely many times except for the case when α is the root of an integer: α = q 1/d, where q ≥ 2 and d ≥ 1 are integers and ξ is a rational factor of a nonnegative integer power of α. |
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Keywords: | fractional part algebraic integer roots power |
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