绝对正规范数空间上Ptolemy常数的计算

A Reconsideration on the Ptolemy Constant of Absolute Normalized Norms

本文在二维绝对正规范数空间上给出了计算Ptolemy常数的一些新条件,得到的结论不仅包含了先前的一些结果,而且在一些具体的空间上给出了Ptolemy常数的新结果.

We determine and estimate the Ptolemy constant of absolute normalized norms on some new conditions.The new results which not only contain the previous results,but also give some new results in some concrete Banach spaces.