3rd International Conference on Pure and Applied Mathematics (ICPAM-VAN 2020), Van, Turkey, 03 September 2020, pp.113
In this paper, we use the coincidence degree theory to establish new results on the existence of T-periodic solutions for a class of nonlinear n-th order dierential equations with mixed delays, which extend some previously known researches. Moreover, an example is given to illustrate the feasibility and application of the achieved results.