A bounded metric space X with metric d has diameter D if μ(x, y) ≤ D and D is the smallest value for which the inequality holds for all pairs x, y in X. So D is the least upper bound of distances between points in the metric space.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。