Koide formula

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Science and technology

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What Wikipedia says

The Koide formula is an unexplained empirical equation proposed by Yoshio Koide ([ko.i.de]) in 1981. It relates the masses of the charged leptons, the electron, muon and tau in the following way:

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

Image: Михаил Круглов, CC BY-SA 4.0, via Wikimedia Commons.