Maximal elements and equilibria of generalized games for -majorized and condensing correspondences.
Multiple periodic solutions to a class of second-order nonlinear mixed-type functional differential equations.
Multiple positive solutions of a singular fractional boundary value problem.
Multiplicity results for sign-changing solutions of an operator equation in ordered Banach space
In this paper, we prove some multiplicity results for sign-changing solutions of an operator equation in an ordered Banach space. The methods to show the main results of the paper are to associate a fixed point index with a strict upper or lower solution. The results can be applied to a wide variety of boundary value problems to obtain multiplicity results for sign-changing solutions.