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math.FA2020
Local approximate symmetry of Birkhoff-James orthogonality in normed linear spaces
Jacek Chmieliński, Divya Khurana, Debmalya Sain
Two different notions of approximate Birkhoff-James orthogonality in nor\-med linear spaces have been introduced by Dragomir and Chmie\-liń\-ski. In the present paper we consider a…
math.FA2020
Norm derivatives and geometry of bilinear operators
Divya Khurana, Debmalya Sain
We study the norm derivatives in the context of Birkhoff-James orthogonality in real Banach spaces. As an application of this, we obtain a complete characterization of the left-sym…