Tyagi, J.J.Tyagi2025-08-302025-08-302012-07-0110.1016/j.aml.2012.03.0192-s2.0-84860222375http://repository.iitgn.ac.in/handle/IITG2025/21042In this note, we show the existence of a global positive solution for a class of first-order delay differential equations: x ^'(t)+a <inf>1</inf>(t)x(t)+a <inf>2</inf>(t)x(t-h(t))=0. In this study, we allow a <inf>1</inf> and a <inf>2</inf> to be of oscillating nature. © 2012 Elsevier Ltd. All rights reserved.trueGeneral theory | Linear functional differential equationsArticle1068-1070July 20121arJournal1