Examples of asymptotically \ell_^1 Banach spaces
arXiv:math/9407210
Abstract
Two examples of asymptotic Banach spaces are given. The first, , has an unconditional basis and is arbitrarily distortable. The second, , does not contain any unconditional basic sequence. Both are spaces of the type of Tsirelson. We thus answer a question raised by W.T.Gowers.