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On the Three-Space Property for Subprojective and Superprojective Banach Spaces
被引:0
|作者:
Gonzalez, Manuel
[1
]
Pello, Javier
[2
]
机构:
[1] Univ Cantabria, Fac Ciencias, Santander 39071, Spain
[2] Univ Rey Juan Carlos, Escuela Super Ciencias Expt & Tecnol, Mostoles 28933, Spain
关键词:
Subprojective Banach space;
superprojective Banach space;
three-space property;
PERTURBATION CLASSES;
OPERATORS;
D O I:
10.1007/s00009-025-02815-4
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
We introduce the notion of subprojective and superprojective operators and we use them to prove a variation of the three-space property for subprojective and superprojective spaces. As an application, we show that some spaces considered by Johnson and Lindenstrauss are both subprojective and superprojective.
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