Twisted Morita-Mumford classes on braid groups
arXiv:math/0606102 · doi:10.2140/gtm.2008.13.293
Abstract
Evaluating the twisted Morita-Mumford classes bar(h)_p on the Artin braid group B_n, we give the stable algebraic independence of the bar(h)_p's on the automorphism group of the free group, Aut(F_n). This is sharper than the results we obtained by restricting them to the mapping class group.
This is the version published by Geometry & Topology Monographs on 25 February 2008