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Covering morphisms of groupoids, derived modules and a 1-dimensional Relative Hurewicz Theorem
Covering morphisms of groupoids derived modules 1-dimensional Relative Hurewicz Theorem
2011/1/21
We fill a lacuna in the literature by giving a version in dimension 1 of the Relative Hurewicz Theorem, and relate this to abelianisations of groupoids, covering spaces,covering morphisms of groupoids...