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A RELATIVE COHOMOLOGICAL INVARIANT FOR GROUP PAIRS
(Manuscripta Mathematica, 1994-04-01) [Artigo]
We define a cohomological invariant E(G, S, M) where G is a group, S is a non empty family of (not necessarily distinct) subgroups of infinite index in G and M is a F2G-module (F2 is the field of two elements). In this ...