EntityQ1425077· pop 17· linked from 305 articlesspectral theoremSign in to savetheoremConnectionsself-adjoint operatorEntityeigenvectors and eigenvaluesEntityBanach algebraEntityspectrumEntitymatrixEntityunitary matrixEntityinner product spaceEntityHermitian adjointEntityprojection-valued measureEntityInternational Standard Book NumberEntitycomplex numberEntitymathematical analysisEntitylinear algebraEntityJohn von NeumannEntitydigital object identifierEntityAugustin-Louis CauchyEntityscalar productEntitydeterminantEntityFourier transformEntitybibcodeEntityCategoriesLinear algebraMatrix theorySingular value decompositionSpectral theoryTheorems in functional analysisTheorems in linear algebra