PageHeader : Funkcialaj $\mathrm{E}\mathrm{k}\mathrm{v}\mathrm{a}\mathrm{c}\check{\mathrm{i}}\mathrm{o}\mathrm{j}$ , 24 (1981) 23-45 Title : Spectral Matrices for First and Second Order Selfadjoint Ordinary Title : Differential Operators with Long Range Potentials AuthorInfo : By AuthorInfo : Seiichi ITATSU and Hitoshi KANETA AuthorInfo : (Shizuoka University and Nagoya University, Japan) section : 1. Introduction and preliminaries section : 2. The ffist order ordinary differential operator section : 3. The second order ordinary differential operator section : Appendix section : References