Abstract
We investigate maps between normed spaces which preserve the orthogonality defined by the norm derivative. These maps are showed to be a scalar multiple of an isometry.
Citation
Chaoqun Chen. Fangyan Lu. "Linear maps preserving orthogonality." Ann. Funct. Anal. 6 (4) 70 - 76, 2015. https://doi.org/10.15352/afa/06-4-70
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