Pseudometric space
- 伪度量（对于集x中任意元素 x,y，若实值函数d:(X,X)->R符合若干条件，称它为一个伪度量（pseudometric））
Pseudometric space
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abstract:
In mathematics, a pseudometric space is a generalized metric space in which the distance between two distinct points can be zero. In the same way as every normed space is a metric space, every seminormed space is a pseudometric space.
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WordNet