EntityQ854946· pop 14· linked from 457 articlesnormal operatorSign in to save(on a complex Hilbert space) continuous linear operatorConnectionsinner product spaceEntityspectrumEntityBanach algebraEntityself-adjoint operatorEntityHilbert–Schmidt operatorEntitymathematicsEntityInternational Standard Book NumberEntitycomplex numberEntityWayback MachineEntitydigital object identifierEntityquantum field theoryEntitycontinuous functionEntityHilbert spaceEntityfunctional analysisEntityRiemann hypothesisEntitylinear mapEntitycalculus of variationsEntityCauchy–Schwarz inequalityEntityBanach spaceEntitytraceEntityCategoriesLinear operatorsOperator theory