Kayar, ZeynepMasiha, Sarbast Kamal Rasheed2025-05-102025-05-1020180139-99181337-221110.1515/ms-2017-01882-s2.0-85057965826https://doi.org/10.1515/ms-2017-0188https://hdl.handle.net/20.500.14720/16012The celebrated Sturm-Picone comparison theorem as well as the well known Leighton's variational lemma and Leighton's theorem, all of which are the fundamental tools of comparison and so, oscillation theory, are obtained for regular and singular nonlinear impulsive differential equations and related previous results in the literature are generalized to such equations. (C) 2018 Mathematical Institute Slovak Academy of Scienceseninfo:eu-repo/semantics/closedAccessImpulseSturmian Comparison TheoryLeighton TheoremNonlinearRegularSingularArticle686Q1Q213731384WOS:000451461500009