English

Generalized Covering Groups and Direct Limits

Group Theory 2011-03-29 v1

Abstract

M. R. R. Moghaddam (Monatsh. Math. 90 (1980) 37-43.) showed that the Baer invariant commutes with the direct limit of a directed system of groups. In this paper, using the generalization of Schur's formula for the structure of a V\mathcal{V}-covering group for a Schur-Baer variety V\mathcal{V}, we show that the structure of a V\mathcal{V}-covering group commutes with the direct limit of a directed system, in some senses. It has a useful application in order to extend some known structures of V\mathcal{V}-covering groups for several famous products of finitely many to an arbitrary family of groups.

Cite

@article{arxiv.1103.5149,
  title  = {Generalized Covering Groups and Direct Limits},
  author = {Behrooz Mashayekhy and Hanieh Mirebrahimi},
  journal= {arXiv preprint arXiv:1103.5149},
  year   = {2011}
}

Comments

22 pages

R2 v1 2026-06-21T17:45:02.207Z