Varieties of simplicial groupoids I: Cro
β
P.J. Ehlers; T. Porter
π
Article
π
1997
π
Elsevier Science
π
English
β 785 KB
It is usual to use algebraic models for homotopy types. Simplicial groupoids provide such a model. Other partial models include the crossed complexes of Brown and Higgins. In this paper, the simplicial groupoids that correspond to crossed complexes are shown to form a variety within the category of