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pro vyhledávání: '"Olesya V. Ivanets"'
Autor:
Olesya V. Ivanets, Andrey R. Chekhlov
Publikováno v:
Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika. :63-68
Let a group G be a finite direct sum of torsion-free rank 1 groups Gi. It is proved that every projectively inert subgroup of G is commensurate with a fully invariant subgroup if and only if all Gi are not divisible by any prime number p, and for dif