#lazytoot — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #lazytoot, aggregated by home.social.
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Ah, it is Schur’s Theorem!
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To paraphrase the question, why is a sum of all operators in a given matrix representation is equal to identity?
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What was the name of the property that makes sum of all operators of a given representation kind of like a delta function when multiplying another operator?