该文讨论四阶常微分方程边值问题u^(4)=f(t,u,u"),0≤t≤1,u(0)=u(1)=u"(0)=u"(1)=0解的存在性,其中f:[0,1]×R×R→R连续.文中提出了一个保证该问题解存在的两参数非共振条件,该条件是用椭圆描述的.
This paper deals with the existence of solutions for the fourth-order boundary value problem u^(4)=f(t,u,u"),0≤t≤1,u(0)=u(1)=u"(0)=u"(1)=0,where f : [0, 1] ×R×R→R is continuous. We present a two-parameter nonresonance condition described by ellipse for the existence of the problem.