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math.GR2012★ 16 cited
Notes on the Sigma invariants
Ralph Strebel
Memoir on the Sigma invariants and their applications, version 2
math.GR2012
A sufficient condition for finite presentability of abelian-by-nilpotent groups
Ralph Strebel
A recipe for obtaining finitely presented abelian-by-nilpotent groups is given. It relies on a geometric procedure that generalizes the construction of finitely presented metabelia…