Publicado

2010-01-01

An Alternative Proof of Hill's Criterion of Freeness for Abelian Groups

Palabras clave:

Abelian group, Freeness, Hill's criterion, G(\aleph_0)-family, Purity (es)

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Autores/as

  • Jorge Eduardo Macías-Díaz Universidad Autónoma de Aguascalientes
In this note we provide a different proof of Hill's criteria of freeness for abelian groups. Our proof hinges on the construction of suitable $G(\aleph_0)$-families of subgroups of the links in Hill's theorem and, ultimately, on the construction of such a family of pure subgroups of the group itself.

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