The study of spectral problems in conjunction with asymptotic analysis has provided profound insights into boundary value problems, where determining the eigenvalues and eigenfunctions of differential ...

A study is made of a class of boundary-value problems for linear second-order differential-difference equations in which the highest-order derivative is multiplied by a small parameter. Consideration ...

This is a preview. Log in through your library . Abstract Laplace- and Helmholtz-type boundary value problems with singularities are considered. A sequence of approximations to the exact boundary ...