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Mathematics  2014 

Twisted homological stability for extensions and automorphism groups of free nilpotent groups

DOI: 10.1017/is014005031jkt267

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We prove twisted homological stability with polynomial coefficients for automorphism groups of free nilpotent groups of any given class. These groups interpolate between two extremes for which homological stability was known before, the general linear groups over the integers and the automorphism groups of free groups. The proof presented here uses a general result that applies to arbitrary extensions of groups, and that has other applications as well.


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