Structure of associated sets to Midy’s property

ABSTRACT: Let b be a positive integer greater than 1, N a positive integer relatively prime to b, |b|N the order of b in the multiplicative group UN of positive integers less than N and relatively primes to N, and x ∈ UN . It is well known that when we write the fraction x N in base b, it is periodic. Let d, k be positive integers with d ≥ 2 and such that |b|N = dk and x N = 0.a1a2 · · · a|b|N with the bar indicating the period and ai are digits in base b. We separate the period a1a2 · · · a|b|N in d blocks of length k and let Aj = [a(j−1)k+1a(j−1)k+2 · · · ajk]b be the number represented in base b by the j − th block and Sd(x) = Pdj=1 Aj . If for all x ∈ UN , the sum Sd(x) is a multiple of bk − 1 we say that N has Midy’s property for b and d. In this work we present some interesting properties of the set of positive integers d such that N has Midy’s property to for b and d.

• Autores: García Pulgarín, Gilberto; Castillo Gómez, Jhon Hermes; Velásquez Soto, Juan Miguel
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2012
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/44305
• Acceso en línea: https://hdl.handle.net/10495/44305
• Palabra clave: Fracciones; Fractions; Números primos; Numbers, prime; Propiedad de Midy; Representación decimal; Grupo multiplicativo de unidades; Periodo (matemáticas)
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-nc-nd/4.0/