对Banach空间中一类中立型二阶无穷时滞微分方程引入适度解的定义,利用Hausdorff非紧测度理论和Darbo不动点定理,得到相关算子族在失去紧性的情况下Banach空间中该类型微分方程适度解的存在性.
This work introduces the concept of mild solution for a class of neutral functional differential equations of second-order with infinite delay in Banach spaces,and shows the existence of mild solutions to the equations of second-order with infinite delay.The Hausdorff measure of non-compactness and Darbo fixed point theory are used,without the assumption of compactness on the associated family of operators.