In this paper, we use the coincidence degree theory to research the odd order delay differential equation , and we obtain the sufficient con- ditions for the existence of periodic solutions, which improves and genera...In this paper, we use the coincidence degree theory to research the odd order delay differential equation , and we obtain the sufficient con- ditions for the existence of periodic solutions, which improves and generalizes some related results in the literatures.展开更多
文摘In this paper, we use the coincidence degree theory to research the odd order delay differential equation , and we obtain the sufficient con- ditions for the existence of periodic solutions, which improves and generalizes some related results in the literatures.
