一类积分微分方程周期边值问题的上下解法

Lower and upper solutions for a class of PBVP of integrodifferential equations

研究了一类纯量形式非线性积分微分方程周期边值问题 ,利用上下解法证明了解的存在性 .

The existence theorem of a class of periodic boundary value problems for first order nonlinear integrodifferential equations is obtained through the method of lower and upper solutions.