通过得到的一个比较结果,并利用单调迭加技巧,给出了一阶混合型脉冲积分-微分方程周期边值问题最大以及最小解的存在性证明.%This paper considers the existence of minimal and maximal solutions of periodic boundary value problems for the first order impulsive integro-differential equations of mixed type by establishing a comparison result and using the monotone iterative technique.
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