Abdullah Özbekler, Prof. Dr.
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PublicationsSCI, SCIE, SSCI and AHCIA. Özbekler (2017), Sturmian comparison theory for halflinear and nonlinear differential equations via Picone Identity, Mathematical Methods in the Applied Sciences, 40, pp. 31003110 Ravi P. Agarwal, A. Özbekler (2017), Lyapunov type inequalities for mixed nonlinearities RiemannLiouville fractional differential equations with a forcing term, Journal of Computational and Applied Mathematics, 314, pp. 6978. Ravi P. Agarwal, E. Çetin, A. Özbekler (2017), Lyapunov type inequalities for secondorder forced dynamic equations with mixed nonlinearities on time scales, Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas (RACSAM), 111, pp. 231246. Ravi P. Agarwal, A. Özbekler (2016), Lyapunov type inequalities for second order forced mixed nonlinear impulsive differential equations, Applied Mathematics and Computation, 282, pp. 216225. A. Özbekler (2016), On the oscillation of Volterra integral equations with positive and negative nonlinearities, Mathematical Methods in the Applied Sciences, 39, pp. 1388–1394. Ravi P. Agarwal, A. Özbekler (2016), Lyapunov type inequalities for nth order forced differential equations with mixed nonlinearities, Communications on Pure and Applied Analysis, 15, pp. 22812300 Ravi P. Agarwal, A. Özbekler (2015), Disconjugacy via Lyapunov and ValléePoussin type inequalities for forced differential equations, Applied Mathematics and Computation , 265, pp. 456468. Ravi P. Agarwal, A. Özbekler (2015), Lyapunov type inequalities for second order sub and superhalflinear differential equations, Dynamical Systems and Applications, 24, pp. 211220. A. Özbekler (2015), Sturmian theory for second order differential equations with mixed nonlinearities, Applied Mathematics and Computation, 259, pp. 379389. Ravi P. Agarwal, A. Özbekler (2015), Lyapunov type inequalities for even order differential equations with mixed nonlinearities, Journal of Inequalities and Applications, 142, pages 10. A. Özbekler (2015), Picone type formula for halflinear impulsive differential equations with discontinuous solutions, Mathematical Methods in the Applied Sciences, 38, pp. 15921600. A. Özbekler, A. Zafer (2012), Nonoscillation and oscillation of secondorder impulsive differential equations with periodic coefficients, Applied Mathematics Letters, Volume 25, March 2012, Pages 294300., Applied Matematics Letters, 25, pp. 294300. O. Došlý, A. Özbekler, R. Simon Hilscher (2012), Oscillation criterion for halflinear differential equations with periodic coefficients, Journal of Mathematical Analysis and Applications, 393, pp. 360366. A. Özbekler, A. Zafer (2011), Oscillation of solutions of second order mixed nonlinear differential equations under impulsive perturbations, Computers and Mathematics with Applications, 61, pp. 933940. A. Özbekler, James S.W. Wong, A. Zafer (2011), Forced secondorder nonlinear differential equations with positive and negative coefficients., Applied Mathematics Letters, 24, pp. 12251230. A. Özbekler, A. Zafer (2010), Principal and nonprincipal solutions of impulsive differential equations with applications, Applied Mathematics and Computation, 216, pp. 11581168. A. Özbekler, A. Zafer (2010), Picone type formula for nonselfadjoint impulsive differential equations with discontinuous solutions, Electronic Journal of Qualitative Theory of Differential Equations, 35, pp. 112. A. Özbekler, A. Zafer (2009), Interval criteria for forced oscillation of superhalflinear differential equations under impulse effect, Mathematical and Computer Modelling, 50, pp. 5965. A. Özbekler, A. Zafer (2007), Forced oscillation of superhalflinear impulsive differential equations, Computers and Mathematics with Applications, 54, pp. 785792. A. Özbekler, A. Zafer (2006), Picone’s formula for linear nonselfadjoint impulsive differential equations, Journal of Mathematical Analysis and Applications, 319, pp. 410423. A. Özbekler, A. Zafer (2005), Sturmian comparison theory for linear and halflinear impulsive differential equations, Nonlinear Analysis (TMA), 63, pp. 289297. Other Refereed JournalsA. Özbekler, A. Zafer (2017), Wong’s oscillation theorem for secondorder delay differential equations,, Journal of Mathematical Sciences, 222, pp. 304–311. Ravi P. Agarwal, A. Özbekler (2016), Lyapunov type inequalities for secondorder differential equations with mixed nonlinearities, Analysis, 36, pp. 245252. A. Özbekler, A. Zafer (2010), LeightonColesWintner type oscillation criteria for halflinear impulsive differential equations, Advances in Dynamical Systems and Applications, 5, pp. 205214. International Conference ProceedingsA. Özbekler, A. Zafer (2013), Forced oscillation of secondorder impulsive differential equations with mixed nonlinearities, Differential and Difference Equations, Springer Proceedings in Mathematics and Statistics, 47, pp. 183195. A. Özbekler, A. Zafer (2011), Secondorder oscillation of mixed nonlinear dynamic equations with several positive and negative coefficients, Discrete and Continuous Dynamical Systems, http://aimsciences.org/index.html, Supplement 2011, pp. 11671175. A. Özbekler, A. Zafer (2009), Oscillation criteria for second order nonlinear impulsive differential equations, Further Progress in Analysis, Proceedings of the 6th International Society for Analysis its Applications and Computation (ISAAC) Congress, AnkaraTURKEY, 1318 August 2007, edited by H.G.W. Begehr (Freie Universität Berlin, Germany), A.O. Çelebi (Yeditepe University, Turkey) & R.P. Gilbert (University of Delaware, USA), , pp. 545555. NotesA. Özbekler (2012), A proposed geometry problem, Pi Mu Epsilon Journal, Problem Department Section, Prb. no: 1255.  