SPECTRAL ESTIMATES FOR A NONHOMOGENEOUS DIFFERENCE PROBLEM
SPECTRAL ESTIMATES FOR A NONHOMOGENEOUS DIFFERENCE PROBLEM
We study an eigenvalue problem in the framework of difference equations. We show that there exist two positive constants λ 0 and λ 1 verifying λ 0 ≤ λ 1 such that any λ ∈ (0, λ 0 ) is not an eigenvalue of the problem, while any λ ∈ …