|
Chebyshevskii Sbornik, 2020, Volume 21, Issue 1, Pages 213–220 DOI: https://doi.org/10.22405/2226-8383-2018-21-1-213-220
(Mi cheb868)
|
|
|
|
Intervals of small measure containing an algebraic number of given height
N. I. Kaloshaa, I. A. Korlyukovab, E. V. Gusevaa a Institute of mathematics of the National
Academy of Sciences of Belarus (Minsk)
b Yanka Kupala State University of Grodno
DOI:
https://doi.org/10.22405/2226-8383-2018-21-1-213-220
Abstract:
Rational numbers are uniformly distributed, even though distances between rational neighbors in a Farey sequence can be quite different. This property doesn't hold for algebraic numbers. In 2013 D. Koleda [6, 7] found the distribution function for real algebraic numbers of an arbitrary degree under their natural ordering.
It can be proved that the quantity of real algebraic numbers $ \alpha $ of degree $n$ and height $H( \alpha ) \le Q$ asymptotically equals $c_{1}(n)Q^{n+1}$. Recently it was proved that there exist intervals of length $Q^{- \gamma }, \gamma >1$, free of algebraic numbers $ \alpha , H( \alpha ) \le Q$, however for $0 \le \gamma <1$ there exist at least $c_{2}(n)Q^{n+1- \gamma }$ algebraic numbers in such intervals.
In this paper we show that special intervals of length $Q^{- \gamma }$ may contain algebraic numbers even for large values of $ \gamma $, however their quantity doesn't exceed $c_{3}Q^{n+1- \gamma }$. An earlier result by A. Gusakova [16] was proved only for the case $\gamma = \frac{3}{2}$.
Keywords:
algebraic number, Diophantine approximation, uniform distribution, Dirichlet's theorem.
Citation:
N. I. Kalosha, I. A. Korlyukova, E. V. Guseva, “Intervals of small measure containing an algebraic number of given height”, Chebyshevskii Sb., 21:1 (2020), 213–220
Linking options:
https://www.mathnet.ru/eng/cheb868 https://www.mathnet.ru/eng/cheb/v21/i1/p213
|
|