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Invariant means and thin sets in harmonic analysis with applications to prime numbers

  • Autores: Pascal Lefèvre, Luis Rodríguez Piazza Árbol académico
  • Localización: Journal of the London Mathematical Society, ISSN 0024-6107, Vol. 80, Nº 1, 2009, págs. 72-84
  • Idioma: inglés
  • DOI: 10.1112/jlms/jdp016
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  • Resumen
    • We first prove a localization principle characterizing Lust-Piquard sets. We obtain that the union of two Lust-Piquard sets is a Lust-Piquard set, provided that one of these two sets is closed for the Bohr topology. We also show that the closure of the set of prime numbers is a Lust-Piquard set, generalizing results of Lust-Piquard and Meyer, and even that the set of integers whose expansion uses fewer than r factors is a Lust-Piquard set. On the other hand, we use random methods to prove that there are some sets that are UC, Ë(q) for every q > 2 and p-Sidon for every p > 1, but which are not Lust-Piquard sets. This is a consequence of the fact that a uniformly distributed set cannot be a Lust-Piquard set.


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