Schur's lemma (disambiguation)
At least three well-known results in mathematics bear the name Schur's lemma:
- Schur's lemma from representation theory
- Schur's lemma from Riemannian geometry
- Schur's lemma in linear algebra says that every square complex matrix is unitarily triangularizable, see Schur decomposition
- Schur test for boundedness of integral operators
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