Fuchsian differential operators with one singular point -- Lieear ordinary differential operators with one singular point -- Linear ordinary differential operators with several singular points -- Elliptic differential operators in ?n degenerating at one point -- Degenerate pseudodifferential operators on a closed curve -- A finite element method for pseudodifferential equations on a closed curve -- Appendix. Suboptimal convergence of the Galerkin method with splines for elliptic pseudodifferential equations