Candan, Tuncay2019-08-012019-08-0120161072-6691https://hdl.handle.net/11480/3704This article presents sufficient conditions for the existence of non oscillatory solutions to first-order differential equations having both delay and advance terms, known as mixed equations. Our main tool is the Banach contraction principle.eninfo:eu-repo/semantics/openAccessNeutral equationsfixed pointnon-oscillatory solutionArticleWOS:000369357700001Q1