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math.FA2014
A note on linear approximately orthogonality preserving mappings
Ye Zhang, Yanni Chen, Don Hadwin +1
In this paper, linear -orthogonality preserving mappings are studied. We define as the smallest for which is $\var…
math.OA2014★ 1 cited
Lifting Normal Elements in Nonseparable Calkin Algebras
Ye Zhang, Don Hadwin, Yanni Chen
We use the remarkable distance estimate of Ilya Kachkovskiy and Yuri Safarov, to show that if is a nonseparable Hilbert space and is any closed ideal in that is not…