Existence of covering topological R-modules

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FILOMAT, cilt.27, ss.1121-1126, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 27 Konu: 6
  • Basım Tarihi: 2013
  • Doi Numarası: 10.2298/fil1306121a
  • Dergi Adı: FILOMAT
  • Sayfa Sayıları: ss.1121-1126


Let R be a topological ring with identity and M a topological (left) R-module such that the underlying topology of M is path connected and has a universal cover. Let 0 is an element of M be the identity element of the additive group structure of M, and N a submodule of the R-module pi(1)(M, 0). In this paper we prove that if R is discrete, then there exists a covering morphism p: ((M) over tilde (N), (0) over tilde) -> (M, 0) of topological R-modules with characteristic group N and such that the structure of R-module on M lifts to (M) over tilde (N). In particular, if N is a singleton group, then this cover becomes a universal cover.