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End invariants of group extensions. (English) Zbl 0472.57001

MSC:
57M05 Fundamental group, presentations, free differential calculus
20F65 Geometric group theory
20F34 Fundamental groups and their automorphisms (group-theoretic aspects)
57N15 Topology of the Euclidean \(n\)-space, \(n\)-manifolds (\(4 \leq n \leq \infty\)) (MSC2010)
20F05 Generators, relations, and presentations of groups
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