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A geometric constant for quantifying the differences between approximate orthogonality types
DOI:10.1007/s00010-026-01295-5.png)
摘要
En 中文
本文介绍并研究了一个新的几何常数D-epsilon(X)(epsilon ∈ [0, 1)),用于度量实赋范线性空间(X, ||·||)中近似等腰正交性与近似Birkhoff-James正交性之间的差异。基于常数D-epsilon(X),给出了内积空间的特征刻画。从关于近似等腰正交性的不等式出发,我们得到了D-epsilon(X)的下界和上界。更精确地,我们证明了对于所有epsilon ∈ (0, 2(√2 - 1),有ε + 2(√2(1 - ε) - 1) ≤ D-epsilon(X) ≤ 1。我们进一步证明所得到的D-epsilon(X)下界是精确的。
Keyword:
Approximate Birkhoff-James orthogonality
Approximate isosceles orthogonality
Geometric constant
Inner product spaces
期刊
A
IF:
0.7
论文数:
75
被引数:
0
机构
引用论文
Quantitative characterization of the difference between Birkhoff orthogonality and isosceles orthogonalityBirkhoff正交性与等腰正交性之间差异的定量表征
Approximate Birkhoff-James Orthogonality in Normed Linear Spaces and Related Topics近似Birkhoff-James正交性在赋范线性空间及相关主题

