Accurate Estimations of Any Eigenpairs of N-th Order Linear Boundary Value Problems

This paper provides a method to bound and calculate any eigenvalues eigenfunctions of n-th order boundary value problems with sign-regular kernels subject two-point conditions. The is based on the selection particular type cone for each eigenpair be determined, recursive application operator associated equivalent integral problem functions belonging such cone, calculation Collatz–Wielandt numbers resulting functions.