Pseudometric space

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Notion

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Science and technology

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What Wikipedia says

In mathematics, a pseudometric space is a generalization of a metric space in which the distance between two distinct points can be zero. Pseudometric spaces were introduced by Đuro Kurepa in 1934. In the same way as every normed space is a metric space, every seminormed space is a pseudometric space.

Excerpt from the Wikipedia article “Pseudometric space”, under the CC BY-SA 4.0 license. Read the article on Wikipedia