Galois Theory and Double Central Extensions

Marino Gran and Valentina Rossi

We define a Galois structure between central extensions and extensions in a Maltsev variety. By using the theory of commutators we introduce double central extensions. We then prove that the covering morphisms relative to this Galois structure are precisely the double central extensions.

Homology, Homotopy and Applications, Vol. 6(2004), No. 1, pp. 283-298

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