Pythagorean means

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Science and technology

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What Wikipedia says

In mathematics, the three classical Pythagorean means are the arithmetic mean (AM), the geometric mean (GM), and the harmonic mean (HM). These means were studied with proportions by Pythagoreans and later generations of Greek mathematicians because of their importance in geometry and music.

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

Image: Dzenanz, Public domain, via Wikimedia Commons.