【摘要】 利用上下解方法研究二阶奇异微分方程u″+f(t,u)=0在边界条件αu(0)-βu′(0)=0,γu(1)+δu′(1)=0下正解的存在性.允许f(t,u)在t=0,1处奇异.更多还原

【Abstract】 This paper studies the existence of positive solutions for second-order singularordinary differential equation u″+f(t,u)=0 with the common boundary value conditionsαu(0)-βu′(0)=0,γu(1)+δu′(1)=0.It is proved by means of upper and lower solutionmethod.更多还原