Weak semiprojectivity in purely infinite simple C*-algebras

被引:8
|
作者
Lin, Huaxin [1 ]
机构
[1] E China Normal Univ, Shanghai, Peoples R China
[2] Univ Oregon, Dept Math, Eugene, OR 97403 USA
关键词
weakly semiprojective; purely infinite simple C*-algebras;
D O I
10.4153/CJM-2007-015-9
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Let A be a separable amenable purely infinite simple C*-algebra which satisfies the Universal Coefficient Theorem. We prove that A is weakly semiprojective if and only if K-i(A) is a countable direct sum of finitely generated groups (i = 0, 1). Therefore, if A is such a C*-algebra, for any epsilon > 0 and any finite subset F subset of A there exist delta > 0 and a finite subset G subset of A satisfying the following: for any contractive positive linear map L : A --> B (for any C* -algebra B) with parallel to L(ab) - L(a)L(b)parallel to < delta for a, b is an element of G there exists a homomorphism h: A -> B such that parallel to h(a) - L(a)parallel to < epsilon for a is an element of T.
引用
收藏
页码:343 / 371
页数:29
相关论文
共 50 条