metric space
度量空间metric space是一个度量metric的集合,通常度量metric是定义在某点集上的函数,
metric
度量必须满足下面四个条件
the distance from a point to itself is zero
the distance between two distict point is positive
the distance from A to B is the same as the distance from B to A
the distance from A to B(directly) is less than or equal to the distance from A to B via any third point C
表达
通常我们使用有序对(M,d)来表示度量空间,M是集合,d是集合M上的度量
代更
- 本文作者: fightinggg
- 本文链接: http://fightinggg.github.io/yilia/yilia/Q24ZYI.html
- 版权声明: 本博客所有文章除特别声明外,均采用 MIT 许可协议。转载请注明出处!