IIntegral Equations and Operator Theory3/28/2026$${\mathfrak {L}}$$-Resolvents and Pseudo-Spectral Functions of Symmetric Linear Relations in Hilbert SpacesVolodymyr DerkachRead at Integral Equations and Operator TheoryTagsAdvanced Operator Algebra ResearchMathematical PhysicsHilbert spaceRigged Hilbert spaceBoundary (topology)Hilbert R-treeHilbert manifoldLinear operatorsLinear mapSpectral theoryEigenvalues and eigenvectorsSymmetric function