一类二阶非线性中立型微分方程周期解的存在性
EXISTENCE OF PERIODIC SOLUTIONS FOR A CLASS OF SECOND ORDER NONLINEAR NEUTRAL DIFFERENTIAL EQUATIONS
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摘要: 利用k-集压缩算子的抽象连续性定理,讨论了一类二阶非线性中立型微分方程周期解的存在性,得到周期解存在的充分条件.Abstract: By using the abstract continuation theorem of k-set contractive operator,the periodic solutions for a second order nonlinear neutral differential equations are investigated.Some sufficient conditions are obtained.