The Schur lemma for orthogonal representations (Q699010)

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scientific article; zbMATH DE number 1810510
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The Schur lemma for orthogonal representations
scientific article; zbMATH DE number 1810510

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    The Schur lemma for orthogonal representations (English)
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    30 March 2003
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    Let \(\sigma\) be an orthogonal representation of a group \(G\) on a real Hilbert space. It is shown that \(\sigma\) is irreducible if and only if its commutant is isomorphic to \(\mathbb{R}\), \(\mathbb{C}\), or \(\mathbb{H}\). The result was known in the finite-dimensional case.
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    orthogonal representations
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