(1, 2)-Groups with p3-regulator quotient

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Mutzbauer O., Solak E.

Journal of Algebra, cilt.320, sa.10, ss.3821-3831, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 320 Konu: 10
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.jalgebra.2008.09.002
  • Dergi Adı: Journal of Algebra
  • Sayfa Sayıları: ss.3821-3831


For a prime p and a poset (1, 2) = (τ1, τ2 < τ3) of types, p-reduced almost completely decomposable groups with critical typeset (1, 2) and a p-power as regulating index are called (1, 2)-groups. The number of near-isomorphism types of indecomposable (1, 2)-groups depends on the exponent pk of the regulator quotient. It is shown that indecomposable (1, 2)-groups with a regulator quotient of exponent ≤ p3 have rank ≤4, and if the types τi and the prime p are fixed, then there are precisely four near-isomorphism types of indecomposable groups. It is unknown for which exponent pk0 of the regulator quotient exist infinitely many near-isomorphism types of indecomposable (1, 2)-groups. © 2008 Elsevier Inc. All rights reserved.