Talk:Angular momentum (quantum)

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 Definition A vector operator of which the three components have well-defined commutation relations. [d] [e]
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I assume that Sekhar made a mistake when he deleted about 90% of the article, so I will revert. (If it was not a mistake we need a long talk). --Paul Wormer 16:42, 16 January 2009 (UTC)

Absolutely agree, Paul, thanks. D. Matt Innis 01:58, 17 January 2009 (UTC)

Square roots

Article should clarify whether these are allowed to take negative values (with different results). Peter Jackson (talk) 09:36, 23 September 2021 (UTC)