---
res:
  bibo_abstract:
  - Let d be a nonsquare positive integer. We give the value of the natural probability
    that the narrow ideal class groups of the quadratic fields ℚ(√d) and ℚ(√−d) have
    the same 4-ranks. @eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Étienne
      foaf_name: Fouvry, Étienne
      foaf_surname: Fouvry
  - foaf_Person:
      foaf_givenName: Jürgen
      foaf_name: Klüners, Jürgen
      foaf_surname: Klüners
      foaf_workInfoHomepage: http://www.librecat.org/personId=21202
  bibo_doi: 10.2140/ant.2010.4.493
  bibo_issue: '5'
  bibo_volume: 4
  dct_date: 2010^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1937-0652
  dct_language: eng
  dct_publisher: Mathematical Sciences Publishers@
  dct_subject:
  - Algebra and Number Theory
  dct_title: On the Spiegelungssatz for the 4-rank@
...