2 papers
math.FA2026
Generalized geometric constants related to Birkhoff orthogonality in Banach spaces
Junxiang Qi, Qian Li, Zhouping Yin +4
In this paper, based on Birkhoff orthogonality, we introduce two geometric constants and $\boldsymbol{D}_{\boldsy…
math.FA2024
On the numerical radius parallelism and the numerical radius Birkhoff orthogonality
Jiaye Bi, Huayou Xie, Yongjin Li
In this paper, we generalize the notions of numerical radius parallelism and numerical radius Birkhoff orthogonality, originally formulated for operators on Hilbert spaces, to oper…