Subgroup property timeline

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Pre-World-War II


  • 1961: Carter introduced the notions of abnormal subgroup and Carter subgroup in his paper Nilpotent self-normalizing subgroups of soluble groups, Math. Zeitschr. 75, 136-139 (1961)
  • 1967: John S. Rose introduced the notion of pronormal subgroup in his paper Finite soluble groups with pronormal system normalizers

1990 onwards