Existence, uniqueness and comparison results for nonlinear boundary value problems involving a deviating argument

On boundary value problems of second order differential inclusions

“…Therefore it is bounded on J and there is a constant K 1 > 0 such that z ≤ K 1 . The explicit form of the function z of (3.3) is given in Heikkila et al [21]. Similarly, the Green's function G(t, s) involved in (3.3) is a continuous real-valued function on J × J and so there is a constant…”

A Degenerate Boundary Value Problem for a Functional Differential Equation

“…Hutson [5], S. Heikkila, J.W. Hooney and S. Seikkala [4] and others have examined the existenoe, uniqueness and comparison results for oertain nonlinear BVP for functional differential equations. Solutions of degenerate BYP for differential equations were dealt with by T. Jonsson [6]» The present paper generalises the results of papers [2] and [6].…”