The existence of positive solutions for second order m-point boundary value problem x″-q(t)f(x,x′)x′=0, x(0)=mi=2bix(ξi),x′(1)=αx′(0)are investigated,w
In this paper, the classical and weak derivatives with respect to spatial variab le of a class of hysteresis functional are discussed. Some conclusions about so
A delayed three-species ratio-dependent predator-prey food-chain model without dominating instantaneous negative feedback is investigated. It is shown that the
This note studies the existence of positive homoclinic orbits of the second orde r equation-u″+α(x)u=β(x)uq+γ(x)up, x∈R,where 1<q<p.Assume that the coeffici
By coincidence degree,the existence of solution to the boundary value problem of a generalized Liénard equation a(t)x"+F(x,x′)x′+g(x)=e(t),x(0)=x(2π),x′(0)=