MR2154376 Gadotti, Marta Cilene and Táboas, Plácido Z. Marta Cilene GADOTTI and Plácido Z. TÁBOAS Oscillations of Planar Impulsive Delay Differential Equations Funkcialaj Ekvacioj. Serio Internacia 48 2005 35--47 http://fe.math.kobe-u.ac.jp/FE/FullPapers/48-1/48_35.pdf http://www.ams.org/mathscinet-getitem?mr=MR2154376 We state sufficient conditions for a certain nonlinear planar differential equation to have only oscillatory solutions. We also obtain a result of this type for a case where the equation is subjected to an impulsive condition. Oscillatory solutions, Impulses, Delay equations. Primary 34K45, Secondary 34K13. 48-35 2005 Oscillations of Planar Impulsive Delay Differential Equations GADOTTI, Marta Cilene and TÁBOAS, Plácido Z. Marta Cilene GADOTTI and Plácido Z. TÁBOAS
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