| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 840319 | Nonlinear Analysis: Theory, Methods & Applications | 2012 | 9 Pages |
Abstract
We show that c0c0 is the only Banach space with unconditional basis that satisfies the equation Ext(X,X)=0Ext(X,X)=0. This partially improves an old result by Kalton and Peck. We prove that the Kalton–Peck maps are strictly singular on a number of sequence spaces, including ℓpℓp for 0
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Authors
Félix Cabello Sánchez, Jesús M.F. Castillo, Jesús Suárez,