In this paper,a class of unconstrained discrete minimax problems is described,in which the objective functions are in C^1. The paper deals with this problem by
The paper deals with the existence of three-solutions for the second-order differential equations with nonlinear boundary value conditions x^n=f(t,x,x'),t∈
A system of retarded functional differential equations is proposed as a predator-prey model with stage structure in the prey.The invariance of non-negativity,na