Gui, Zhanji2021-07-192021-07-192006-08-15Gui, Z. (2006). Existence of positive periodic solutions to third-order delay differential equations. <i>Electronic Journal of Differential Equations, 2006</i>(91), pp. 1-7.1072-6691https://hdl.handle.net/10877/13964Using the continuation theorem of coincidence degree theory and analysis techniques, we establish criteria for the existence of periodic solutions to the following third-order neutral delay functional differential equation with deviating arguments x˙˙˙(t) + aẍ(t) + g(ẋ(t - τ(t))) + ƒ(x(t - τ(t))) = p(t). Our results complement and extend known results and are illustrated with examples.Text7 pages1 file (.pdf)enAttribution 4.0 InternationalNeutral delayThird-order differential equationPeriodic solutionArticle