Abstract
This paper is primarily concerned with the existence of solutions of the fourth-order self-adjoint differential equation (1) (where r(x) > 0, q(x) ≥ 0, p(x) ≥ 0 and all three coefficients are continuous on [a, ∞)) and one of the two-point boundary conditions: (2) or (3) the subscript notation for any solution y(x) denoting: (4)