Geodesic
Higher non-abelian cohomology of groups
Glasgow mathematical journal, Tome 44 (2002) no. 3, pp. 497-520

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The first non-abelian cohomology of groups introduced by Guin is extended to any dimensions and for a substantially wider class of coefficients called G-partially crossed P-modules. The first and the second non-abelian cohomologies of groups are described in terms of torsors and extensions of groups respectively. Higher non-abelian cohomology pointed sets are described in terms of cotriple right derived functors of the group of derivations with respect to the first contravariant variable. For any short exact coefficient sequence a long exact cohomology sequence is obtained extending the well-known exact cohomology sequences and higher cohomology of groups with coefficients in any G-group is introduced. 
Inassaridze, Hvedri. Higher non-abelian cohomology of groups. Glasgow mathematical journal, Tome 44 (2002) no. 3, pp. 497-520. doi: 10.1017/S0017089502030148
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     title = {Higher non-abelian cohomology of groups},
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     year = {2002},
     volume = {44},
     number = {3},
     doi = {10.1017/S0017089502030148},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089502030148/}
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