Upper and lower solutions satisfying the inverse inequality
Volume 65 / 1997
Annales Polonici Mathematici 65 (1997), 235-244
DOI: 10.4064/ap-65-3-235-244
Abstract
We consider multipoint and two-point BVPs for second order ordinary differential equations with a Carathéodory right hand side. We prove the existence of solutions provided there exist upper and lower solutions of the BVP and the upper solution is less than the lower one.
