| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 843105 | Nonlinear Analysis: Theory, Methods & Applications | 2009 | 6 Pages |
Abstract
The purpose of this paper is to introduce and to discuss the concept of approximation preserving operators on Banach lattices with a strong unit. We show that every lattice isomorphism is an approximation preserving operator. Also we give a necessary and sufficient condition for uniqueness of the best approximation by closed normal subsets of X+X+, and show that this condition is characterized by some special operators.
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Authors
S.M.S. Modarres, M. Dehghani,