14 citations · 20 across the 5 of their papers we have counts for
8 papers
Boundary Amenability of Relatively Hyperbolic Groups
Narutaka Ozawa
Let K be a fine hyperbolic graph and G be a group acting on K with finite quotient. We prove that G is exact provided that all vertex stabilizers are exact. In particular, a relati…
A note on non-amenability of B(\ell_p) for p=1,2
Narutaka Ozawa
This is an expository note on non-amenabilty of the Banach algebra B(\ell_p) for p=1,2. These were proved respectively by Connes (p=2) and Read (p=1) via very different methods. We…
About the QWEP conjecture
Narutaka Ozawa
This is a detailed survey on the QWEP conjecture and Connes' embedding problem. Most of contents are taken from Kirchberg's paper [Invent. Math. 112 (1993)].
There is no separable universal II_1-factor
Narutaka Ozawa
Gromov constructed uncountably many pairwise non-isomorphic discrete groups with Kazhdan's property (T). We will show that no separable II_1-factor can contain all these groups in…
On ${\OL}_{\infty}$ structure of nuclear -algebras
M. Junge, N. Ozawa, Z. J. Ruan
We study the local operator space structure of nuclear -algebras. It is shown that a -algebra is nuclear if and only if it is an $\OL_{\infty, \la}$ space for some (and a…
Homotopy invariance of AF-embeddability
Narutaka Ozawa
We prove that AF-embeddability is a homotopy invariant in the class of separable exact -algebras. This work was inspired by Spielberg's work on homotopy invariance of AF-embed…