Singular Ordinary Differential Operators and Pseudodifferential Equations

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.