Peano–Jordan measure

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Notion

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Science and technology

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What Wikipedia says

In mathematics, the Peano–Jordan measure (also known as the Jordan content) is an extension of the notion of size (length, area, volume) to shapes more complicated than, for example, a triangle, disk, or parallelepiped.

Excerpt from the Wikipedia article “Peano–Jordan measure”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Oleg Alexandrov, Public domain, via Wikimedia Commons.