本文利用Avery和Peterson引入的新的不动点定理,得出了泛函微分方程边值问题存在三个正解的充分条件{x''(t)+q(t)f(t,x(t),x(t-r),x'(t))=0,0〈t〈1,r〈0,x(t)=ξ(t),-r≤r≤0,x(1)=0并得出了有关新结果.
We obtain sufficient conditions for the existence of at least three positive solutions for the boundary value problem of a second order functional differential equation{x''(t)+q(t)f(t,x(t),x(t-r),x'(t))=0,0〈t〈1,r〈0,x(t)=ξ(t),-r≤r≤0,x(1)=0 this is an application of a new fixed point theorem introduced by Avery and Peterson.