The quadratic isoperimetric inequality for mapping tori of free group automorphisms
arXiv:0802.1323
Abstract
If F is a finitely generated free group and ϕis an automorphism of F then F \rtimes_ϕZ satisfties a quadratic isoperimetric inequality.
188 pages, many figures. This is a monograph in three parts. The three parts have been circulated for a number of years separately (and are arXiv:math/0211459, arXiv:math/0507589 and arXiv:math/0610332). Memoirs of the AMS, to appear