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Operator spaces with few completely bounded maps
被引:24
|作者:
Oikhberg, T
[1
]
Ricard, É
机构:
[1] Univ Calif Irvine, Dept Math, Irvine, CA 92697 USA
[2] Univ Franche Comte, Dept Math Besancon, F-25030 Besancon, France
关键词:
D O I:
10.1007/s00208-003-0481-2
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
We construct several examples of Hilbertian operator spaces with few completely bounded maps. In particular, we give an example of a separable 1-Hilbertian operator space X-0 such that, whenever X' is an infinite dimensional quotient of X-0, X is a subspace of X', and T:T : X --> X' is a completely bounded map, then T=lambdaI(X)+S, where S is compact Hilbert-Schmidt and ||S||(2)/16less than or equal to||S||(cb)less than or equal to||S||(2). Moreover, every infinite dimensional quotient of a subspace of X-0 fails the operator approximation property. We also show that every Banach space can be equipped with an operator space structure without the operator approximation property.
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页码:229 / 259
页数:31
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