2015
DOI: 10.4064/aa170-1-1
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Relative Bogomolov extensions

Abstract: Abstract. A subfield K ⊆ Q has the Bogomolov property if there exists a positive ε such that no non-torsion point of K × has absolute logarithmic height below ε. We define a relative extension L/K to be Bogomolov if this holds for points of L × \ K × . We construct various examples of extensions which are and are not Bogomolov. We prove a ramification criterion for this property, and use it to show that such extensions can always be constructed if some rational prime has bounded ramification index in K and K/Q… Show more

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Cited by 6 publications
(5 citation statements)
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“…First of all, it is known that h has the Northcott or Bogomolov property, when restricted to suitable sub-fields of Q having infinite degree over Q. We refer the interested reader to [16,29,30,46,51,139] for the study of fields having the Northcott property, and to [3,4,16,53,54,56,64,72,115,119] for the study of fields having the Bogomolov one. Moreover, it has also been shown that many fields F Â Q do not have the Bogomolov property.…”
Section: Logarithmic Weil Heightmentioning
confidence: 99%
“…First of all, it is known that h has the Northcott or Bogomolov property, when restricted to suitable sub-fields of Q having infinite degree over Q. We refer the interested reader to [16,29,30,46,51,139] for the study of fields having the Northcott property, and to [3,4,16,53,54,56,64,72,115,119] for the study of fields having the Bogomolov one. Moreover, it has also been shown that many fields F Â Q do not have the Bogomolov property.…”
Section: Logarithmic Weil Heightmentioning
confidence: 99%
“…First of all, it is known that h has the Northcott or Bogomolov property, when restricted to suitable sub-fields of Q having infinite degree over Q. We refer the interested reader to [12,26,98,20,29,18] for the study of fields having the Northcott property, and to [12,4,50,87,3,43,36,33,32,84] for the study of fields having the Bogomolov one. Moreover, it has also been shown that many fields F ⊆ Q do not have the Bogomolov property.…”
Section: 2mentioning
confidence: 99%
“…. So 0-Northcott and 0-Bogomolov are the usual Northcott and Bogomolov property (formally introduced by Bombieri and Zannier [4], and studied, e.g., in [4,6,2,3,1,9,5,7,11,8]), whereas 1-Bogomolov was recently introduced by Pazuki and Pengo in [10] as Lehmer property. The authors of the latter article implicitly raised the problem of constructing a field with Lehmer property that fails to have Bogomolov property.…”
Section: Introductionmentioning
confidence: 99%