EntityQ3123529· pop 7· linked from 116 articlesspectral geometrySign in to savefield in mathematicsConnectionsspectrumEntityBanach algebraEntitymathematicsEntityDavid HilbertEntitydigital object identifierEntityHermann WeylEntityEuclidean spaceEntityJSTOREntityHilbert spaceEntityfunctional analysisEntityRiemann hypothesisEntitymanifoldEntityeigenvectors and eigenvaluesEntitycalculus of variationsEntityJohn MilnorEntityLaplace operatorEntityBanach spaceEntityRiemannian geometryEntityisometryEntityintegral equationEntityCategoriesDifferential geometryRiemannian geometrySpectral theory