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math.KT2003
N-Fold Cech Derived Functors and Generalised Hopf Type Formulas
Guram Donadze, Nick Inassaridze, Timothy Porter
In 1988, Brown and Ellis published [3] a generalised Hopf formula for the higher homology of a group. Although substantially correct, their result lacks one necessary condition. We…
math.KT1999★ 5 cited
Freeness conditions for crossed squares and squared complexes
A. Mutlu, T. Porter
Following Ellis, we investigate the notion of totally free crossed squares and related square complexes. It is shown how to interpret the information in a free simplicial group giv…