fully inert subgroup;
fully invariant subgroup;
commensurable subgroups;
completely decomposable group;
index of a subgroup;
D O I:
10.1134/S0001434617010394
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
The completely decomposable torsion-free Abelian groups with finitely many homogeneous components for which every fully inert subgroup is commensurable with a fully invariant subgroup are described.
机构:
Department of Mathematics, St. Petersburg State Technical University, St. Petersburg 195251Department of Mathematics, St. Petersburg State Technical University, St. Petersburg 195251