Orthogonality preserving property, Wigner equation, and stability
Journal of Inequalities and Applications volume 2006, Article number: 76489 (2006)
We deal with the stability of the orthogonality preserving property in the class of mappings phase-equivalent to linear or conjugate-linear ones. We give a characterization of approximately orthogonality preserving mappings in this class and we show some connections between the considered stability and the stability of the Wigner equation.
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Chmieliński, J. Orthogonality preserving property, Wigner equation, and stability. J Inequal Appl 2006, 76489 (2006). https://doi.org/10.1155/JIA/2006/76489