EntityQ4454958· pop 5· linked from 451 articlesMin-max theoremSign in to savevariational characterization of eigenvalues of compact Hermitian operators on Hilbert spacesConnectionsBanach algebraEntityspectrumEntityHilbert spaceEntitysingular valueEntityInternational Standard Book NumberEntitymathematical analysisEntitylinear algebraEntitydigital object identifierEntityintegralEntityderivativeEntityscalar productEntityJSTOREntityvector calculusEntityfunctional analysisEntityQ118398EntityRiemann hypothesisEntityeigenvectors and eigenvaluesEntitycalculus of variationsEntitymeasureEntityBanach spaceEntityCategoriesOperator theorySpectral theoryTheorems in functional analysis