منابع مشابه
A Kurosh Type Theorem for Type Ii1 Factors
The classification of type II1 factors (of discrete groups) was initiated by Murray and von Neumann [MvN] who distinguished the hyperfinite type II1 factor R from the group factor LFr of the free group Fr on r ≥ 2 generators. Thirty years later, Connes [Co2] proved uniqueness of the injective type II1 factor. Thus, the group factor LΓ of an ICC amenable group Γ is isomorphic to the hyperfinite ...
متن کاملExistentially Closed Ii1 Factors
We examine the properties of existentially closed (R-embeddable) II1 factors. In particular, we use the fact that every automorphism of an existentially closed (R-embeddable) II1 factor is approximately inner to prove that Th(R) is not model-complete. We also show that Th(R) is complete for both finite and infinite forcing and use the latter result to prove that there exist continuum many nonis...
متن کاملGenerators of II1 factors
In 2005, Shen introduced a new invariant, G(N), of a di use von Neumann algebra N with a xed faithful trace, and he used this invariant to give a uni ed approach to showing that large classes of II1 factors M are singly generated. This paper focuses on properties of this invariant. We relate G(M) to the number of self-adjoint generators of a II1 factor M : if G(M) < n/2, then M is generated by ...
متن کاملType II1 Factors With A Single Generator
In the paper, we study the generator problem of type II1 factors. By defining a new concept closely related to the numbers of generators of a von Neumann algebra, we are able to show that a large class of type II1 factors are singly generated, i.e., generated by two self-adjoint elements. In particular, we show that most of type II1 factors, whose free entropy dimensions are known to be less th...
متن کاملSome Endomorphisms of Ii1 Factors
For any finite dimensional C∗-algebra A , we give an endomorphism Φ of the hyperfinite II1 factor R of finite Jones index such that: ∀ k ∈ N, Φk(R)′ ∩R = ⊗kA. The Jones index [R : Φ(R)] = (rank (A)), here rank (A) is the dimension of the maximal abelian subalgebra of A.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal für die reine und angewandte Mathematik (Crelles Journal)
سال: 2015
ISSN: 0075-4102,1435-5345
DOI: 10.1515/crelle-2013-0084