New type parallelogram laws in Banach spaces and geodesic spaces with curvature bounded above

被引：0

作者：

Yasunori Kimura

Shuta Sudo

机构：

[1] Toho University,Department of Information Science

来源：

Arabian Journal of Mathematics | 2023年 / 12卷

关键词：

52A21; 52A55;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The parallelogram law characterizes a part of the structure of Hilbert spaces. To hold the parallelogram law by the norm, reasonably good conditions are required for Banach spaces. This paper proposes new type parallelogram laws with bifunctions on Banach spaces and geodesic spaces, respectively.

引用

页码：389 / 412

页数：23

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