A Characterization of the Quadratic Irrationals

Canadian Mathematical Bulletin - Tập 34 Số 1 - Trang 36-41 - 1991
Tom C. Brown1
1Department of Mathematics and Statistics Simon Fraser University Burnaby, BC V5A ISA

Tóm tắt

AbstractLet α be a positive irrational real number, and let fα (n) = [(n + l)α] — [nα] — [α],n > 1, where [x] denotes the greatest integer not exceeding x. It is shown that the sequence fα has a certain 'substitution property' if and only if α is the root of a quadratic equation over the rationals.

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Tài liệu tham khảo

Karhumaki, 1983, On cube-free w -words generated by binary morphisms, 5, 279

Venkov, 1970, Elementary Number Theory, 65

Bernoulli, 1772, Sur une nouvelle espèce de calcul, Recueil pour les astronomes, 2

Berstel, Mots de Fibonacci, 57

Fraenkel, 1978, Determination of[n9] by its sequence of differences, 21, 441

Restivo, 1989, Permutation properties and the Fibonacci semigroup, 38, 337

Markoff, 1882, Sur une question de Jean Bernoulli, 19, 27

Stolarsky, 1976, Beatty sequences, continued fractions, and certain shift operators, 19, 473