Prof. Dr. &#214;ZKAN &#214;CAL

Proceedings of the Edinburgh Mathematical Society , cilt.65, sa.3, ss.618-631, 2022 (SCI-Expanded)

Oscillation criteria for first-order dynamic equations with nonmonotone delays

Kilic N., ÖCALAN Ö.

HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS , cilt.50, sa.2, ss.318-325, 2021 (SCI-Expanded)

An improved oscillation criteria for first order dynamic equations

TURKISH JOURNAL OF MATHEMATICS , cilt.45, sa.1, ss.487-495, 2021 (SCI-Expanded)

Solutions to Conjectures on a Nonlinear Recursive Equation

ÖCALAN Ö., Duman O.

CZECHOSLOVAK MATHEMATICAL JOURNAL , cilt.70, sa.3, ss.867-880, 2020 (SCI-Expanded)

Oscillation of first-order dynamic equations with nonmonotone delay

ÖCALAN S., ÖCALAN Ö., Yildiz M. K.

MATHEMATICAL METHODS IN THE APPLIED SCIENCES , cilt.43, sa.7, ss.3954-3964, 2020 (SCI-Expanded)

Oscillatory Behavior of Advanced Difference Equations with General Arguments

FILOMAT , cilt.34, sa.12, ss.4161-4169, 2020 (SCI-Expanded)

Oscillation analysis for nonlinear difference equation with non-monotone arguments

Ocalan O., ÖZKAN U. M., YILDIZ M. K.

ADVANCES IN DIFFERENCE EQUATIONS , cilt.2018, 2018 (SCI-Expanded)

An improved oscillation criterion for first order difference equations

CHATZARAKIS G. E., ÖCALAN Ö.

BULLETIN MATHEMATIQUE DE LA SOCIETE DES SCIENCES MATHEMATIQUES DE ROUMANIE , cilt.59, sa.1, ss.65-73, 2016 (SCI-Expanded)

Oscillation of differential equations with non-monotone retarded arguments

LMS JOURNAL OF COMPUTATION AND MATHEMATICS , cilt.19, sa.1, ss.98-104, 2016 (SCI-Expanded)

New oscillation tests and some refinements for first-order delay dynamic equations

CHATZARAKIS G. E., Ocalan O.

TURKISH JOURNAL OF MATHEMATICS , cilt.40, sa.4, ss.850-863, 2016 (SCI-Expanded)

An Oscillation Criterion for First Order Difference Equations

Ocalan O., Ozturk S. S.

RESULTS IN MATHEMATICS , cilt.68, sa.1-2, ss.105-116, 2015 (SCI-Expanded)

Oscillations of difference equations with non-monotone retarded arguments

APPLIED MATHEMATICS AND COMPUTATION , cilt.258, ss.60-66, 2015 (SCI-Expanded)

Oscillations of differential equations with several non-monotone advanced arguments

CHATZARAKIS G. E., Ocalan O.

DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL , cilt.30, sa.3, ss.310-323, 2015 (SCI-Expanded)

Dynamics of the difference equation x(n+1) = p(n) + xn-kx(n) with a period-two coefficient

APPLIED MATHEMATICS AND COMPUTATION , cilt.228, ss.31-37, 2014 (SCI-Expanded)

Global Asymptotic Stability of a Nonautonomous Difference Equation

Gumus M., Ocalan O.

JOURNAL OF APPLIED MATHEMATICS , cilt.2014, 2014 (SCI-Expanded)

Some Notes on the Difference Equation xn+1 = alpha + (xn-1/x(n)(k))

Gumus M., Ocalan O.

DISCRETE DYNAMICS IN NATURE AND SOCIETY , cilt.2012, 2012 (SCI-Expanded)

On the Dynamics of the Recursive Sequence xn+1 = alpha + xn-k(p)/x(n)(q)

Gumus M., Ocalan O., Felah N. B.

DISCRETE DYNAMICS IN NATURE AND SOCIETY , cilt.2012, 2012 (SCI-Expanded)

COMPARISON CRITERIA FOR THE OSCILLATION OF MIXED-TYPE IMPULSIVE DIFFERENCE EQUATIONS WITH CONTINUOUS ARGUMENTS

KARPUZ B., Ocalan O., Ozturk S.

HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS , cilt.40, sa.2, ss.265-272, 2011 (SCI-Expanded)

Oscillation of first-order impulsive difference equations with continuous arguments

KARPUZ B., Ocalan O., Ozturk S.

JOURNAL OF COMPUTATIONAL ANALYSIS AND APPLICATIONS , cilt.12, sa.2, ss.539-543, 2010 (SCI-Expanded)

COMPARISON THEOREMS ON THE OSCILLATION OF A CLASS OF NEUTRAL DIFFERENCE EQUATIONS WITH CONTINUOUS VARIABLES

BULLETIN OF THE KOREAN MATHEMATICAL SOCIETY , cilt.47, sa.2, ss.401-409, 2010 (SCI-Expanded)

COMPARISON THEOREMS ON THE OSCILLATION AND ASYMPTOTIC BEHAVIOUR OF HIGHER-ORDER NEUTRAL DIFFERENTIAL EQUATIONS

KARPUZ B., Ocalan O., Ozturk S.

GLASGOW MATHEMATICAL JOURNAL , cilt.52, ss.107-114, 2010 (SCI-Expanded)

Further oscillation criteria for partial difference equations with variable coefficients

COMPUTERS & MATHEMATICS WITH APPLICATIONS , cilt.59, sa.1, ss.55-63, 2010 (SCI-Expanded)

Necessary and sufficient conditions on asymptotic behaviour of solutions of forced neutral delay dynamic equations

NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS , cilt.71, sa.7-8, ss.3063-3071, 2009 (SCI-Expanded)

OSCILLATION AND NONOSCILLATION OF FIRST-ORDER DYNAMIC EQUATIONS WITH POSITIVE AND NEGATIVE COEFFICIENTS

DYNAMIC SYSTEMS AND APPLICATIONS , cilt.18, sa.3-4, ss.363-374, 2009 (SCI-Expanded)

Oscillation criteria for a class of second-order neutral delay differential equations

KARPUZ B., Manojlovic J. V., Oecalan O., Shoukaku Y.

APPLIED MATHEMATICS AND COMPUTATION , cilt.210, sa.2, ss.303-312, 2009 (SCI-Expanded)

Oscillation of a class of difference equations of second order

KARPUZ B., Oecalan O., Yildiz M. K.

MATHEMATICAL AND COMPUTER MODELLING , cilt.49, sa.5-6, ss.912-917, 2009 (SCI-Expanded)

NECESSARY AND SUFFICIENT CONDITIONS FOR THE OSCILLATORY AND ASYMPTOTIC BEHAVIOUR OF SOLUTIONS TO NEUTRAL DELAY DYNAMIC EQUATIONS

KARPUZ B., Ocalan O., RATH R.

ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS , cilt.2009, ss.1-15, 2009 (SCI-Expanded)

Existence of positive solutions for a neutral differential equation with positive and negative coefficients

APPLIED MATHEMATICS LETTERS , cilt.22, sa.1, ss.84-90, 2009 (SCI-Expanded)

Oscillation of higher-order nonlinear delay differential equations with oscillatory coefficients

KARPUZ B., Ocalan O., Yildiz M. K.

TURKISH JOURNAL OF MATHEMATICS , cilt.33, sa.3, ss.259-263, 2009 (SCI-Expanded)

Oscillation of nonlinear neutral delay differential equations of second-order with positive and negative coefficients

Yildiz M. K., KARPUZ B., Ocalan O.

TURKISH JOURNAL OF MATHEMATICS , cilt.33, sa.4, ss.341-350, 2009 (SCI-Expanded)

Oscillation analysis of neutral difference equations with delays

Oecalan O., Duman O.

CHAOS SOLITONS & FRACTALS , cilt.39, sa.1, ss.261-270, 2009 (SCI-Expanded)

Iterated Oscillation Criteria for Delay Dynamic Equations of First Order

BOHNER M., KARPUZ B., Oecalan O.

ADVANCES IN DIFFERENCE EQUATIONS , cilt.2008, 2008 (SCI-Expanded)

ON THE OSCILLATION OF NONLINEAR NEUTRAL DIFFERENTIAL EQUATION WITH POSITIVE AND NEGATIVE COEFFICIENTS

Ocalan O., Yildiz M. K., KARPUZ B.

DYNAMIC SYSTEMS AND APPLICATIONS , cilt.17, sa.3-4, ss.667-675, 2008 (SCI-Expanded)

Oscillation of forced neutral differential equations with positive and negative coefficients

COMPUTERS & MATHEMATICS WITH APPLICATIONS , cilt.54, sa.11-12, ss.1411-1421, 2007 (SCI-Expanded)

Oscillation of neutral differential equation with positive and negative coefficients

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS , cilt.331, sa.1, ss.644-654, 2007 (SCI-Expanded)

Oscillation results for higher order nonlinear neutral delay difference equations

YILDIZ M. K., Ocalan O.

APPLIED MATHEMATICS LETTERS , cilt.20, sa.3, ss.243-247, 2007 (SCI-Expanded)

Oscillation of difference equations with variable coefficients

Portugaliae Mathematica , cilt.63, sa.4, ss.407-414, 2006 (SCI-Expanded)

Oscillations of higher-order of systems of difference equations

Ocalan O., AKIN O.

INDIAN JOURNAL OF PURE & APPLIED MATHEMATICS , cilt.36, sa.7, ss.349-360, 2005 (SCI-Expanded)

Oscillations of the system of linear nonautonomous difference equations

Ocalan O., AKIN O.

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS , cilt.283, sa.1, ss.213-218, 2003 (SCI-Expanded)

Diğer Dergilerde Yayınlanan Makaleler 40

AN IMPROVED OSCILLATION THEOREM FOR NONLINEAR DIFFERENTIAL EQUATIONS OF ADVANCED TYPE

Kiliç N., ÖCALAN Ö., Yildiz M. K.

Archivum Mathematicum , cilt.60, sa.3, ss.145-152, 2024 (ESCI)

Sufficient oscillation conditions for dynamic equations with nonmonotone delays

ÖCALAN Ö., KILIÇ N.

Journal of Applied Mathematics and Informatics , cilt.40, ss.843-856, 2022 (Scopus)

An improvement for oscillation of first order difference equations

Palestine Journal of Mathematics , cilt.11, sa.3, ss.455-461, 2022 (Scopus)

OSCILLATION RESULTS FOR SYSTEM OF DIFFERENTIAL EQUATIONS WITH SEVERAL DELAY TERMS

CHATZARAKIS G. E., ÖCALAN Ö., ÖZTÜRK S.

Electronic Journal of Mathematical Analysis and Applications , cilt.9, sa.2, ss.99-105, 2021 (Hakemli Dergi)

Oscillation Tests For Nonlinear Differential Equations With Several Nonmonotone Advanced Arguments

Kilic N., ÖCALAN Ö., ÖZKAN U. M.

APPLIED MATHEMATICS E-NOTES , cilt.21, ss.253-262, 2021 (ESCI)

Oscillatory behavior for nonlinear delay differential equation with several non-monotone arguments

ÖCALAN Ö., Kilic N., Ozkan U. M., Ozturk S.

COMPUTATIONAL METHODS FOR DIFFERENTIAL EQUATIONS , cilt.8, sa.1, ss.14-27, 2020 (ESCI)

Oscillation Criteria for Difference Equations with Several Arguments

Kılıç N., ÖCALAN Ö.

INTERNATIONAL JOURNAL OF DIFFERENCE EQUATIONS , cilt.15, sa.1, ss.109-119, 2020 (Scopus)

Oscillation analysis for higher order difference equation with non-monotone arguments

ÖCALAN Ö., ÖZKAN U. M.

Journal Of Computational Analysis And Applications , cilt.27, ss.781-789, 2019 (Scopus)

On solutions of the recursive equations x_{n1}=x_{n-1}{p}/x_{n}{p} (p0) via Fibonacci-type sequences

ÖCALAN Ö., DUMAN O.

Electron. J. Math. Anal. Appl. , cilt.7, sa.1, ss.102-115, 2019 (Hakemli Dergi)

OSCILLATORY BEHAVIOROF NONLINEAR ADVANCED DIFFERENTIAL EQUATIONS WITH A NON-MONOTONE ARGUMENT

Ocalan O., Kilic N., Ozkan U. M.

ACTA MATHEMATICA UNIVERSITATIS COMENIANAE , cilt.88, sa.2, ss.239-246, 2019 (ESCI)

THE QUALITATIVE ANALYSIS OF A RATIONAL SYSTEM OF DIFFERENCE EQUATIONS

GÜMÜŞ M., ÖCALAN Ö.

Journal of Fractional Calculus and Applications , cilt.9, sa.2, ss.113-126, 2018 (Hakemli Dergi)

OSCILLATION CRITERIA FOR DELAY DYNAMIC EQUATIONS ON TIME SCALES

ÖCALAN Ö., ÖZTÜRK S.

Electronic Journal of Mathematical Analysis and Applications , cilt.6, sa.2, ss.51-59, 2018 (Hakemli Dergi)

Oscillation of Nonlinear Delay Differential Equation with Non-Monotone Arguments

ÖCALAN Ö., Kılıç N., ÖZTÜRK S., ÖZKAN U. M.

INTERNATIONAL JOURNAL OF ANALYSIS AND APPLICATIONS , cilt.14, sa.2, ss.147-154, 2017 (ESCI)

Dynamical Behavior of a Third-Order Difference Equation with Arbitrary Powers

Gumus M., ABO-ZEID R., ÖCALAN Ö.

KYUNGPOOK MATHEMATICAL JOURNAL , cilt.57, sa.2, ss.251-263, 2017 (ESCI)

Oscillations of dynamic equations on time scales with advanced arguments

ÖCALAN Ö., Ozkan U. M.

INTERNATIONAL JOURNAL OF DYNAMICAL SYSTEMS AND DIFFERENTIAL EQUATIONS , cilt.6, sa.4, ss.275-284, 2016 (ESCI)

Global analysis of a non autonomous difference equation with bounded coefficient

ÖCALAN Ö., GÜMÜŞ M.

Electron. J. Math. Anal. Appl. , cilt.4, sa.1, ss.184-191, 2016 (Hakemli Dergi)

Oscillations for differential equations with several deviating arguments

Pacific Journal of Applied Mathematics , cilt.7, ss.119-131, 2015 (Hakemli Dergi)

Iterated oscillation criteria for delay partial difference equations

ÖCALAN Ö., ÖĞÜNMEZ H., GÜMÜŞ M.

MATHEMATICA BOHEMICA , cilt.139, sa.3, ss.437-450, 2014 (Scopus)

Global behavior test for a nonlinear difference equation with a period-two coefficient

Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal. , cilt.21, sa.3-4, ss.307-316, 2014 (Hakemli Dergi)

Global dynamics of a non autonomous rational difference equation

JOURNAL OF APPLIED MATHEMATICS & INFORMATICS , cilt.32, sa.5-6, ss.843-848, 2014 (Hakemli Dergi)

Oscillation of delay dynamic equations with oscillating coefficients

Differential Equations & Applications , cilt.5, sa.3, ss.331-339, 2013 (ESCI)

Oscillation of Higher Order Systems of Differential Equations

International Journal of Mathematical Analysis , cilt.7, sa.15, ss.735-740, 2013 (Hakemli Dergi)

Oscillation Results for Odd Order Difference Equations

Global Journal of Pure and Applied Mathematics , cilt.9, ss.205-214, 2013 (Hakemli Dergi)

New Oscillation Criteria for System of Difference Equations

Far East Journal of Mathematical Sciences , cilt.72, sa.1, ss.109-116, 2013 (Hakemli Dergi)

Oscillation of difference equations with several positive and negative coefficients

Fasciculi Mathematici , cilt.51, ss.115-122, 2013 (Hakemli Dergi)

Oscillation of neutral differential equations with distributed deviating arguments

CANDAN T., KARPUZ B., ÖCALAN Ö.

Journal of Mathematical Sciences , cilt.187, sa.4, ss.444-457, 2012 (Scopus)

Oscillation criteria for a class of first order forced differential equations under impulse effects

Advances in Dynamical Systems and Applications , cilt.7, ss.205-218, 2012 (Scopus)

Asymptotic behavior of a higher order recursive sequence

Int. J. Difference Equ. , cilt.7, sa.2, ss.175-180, 2012 (Scopus)

Oscillation and nonoscillation in neutral delay dynamic equations with positive and negative coefficients

KARPUZ B., KAYMAKÇALAN B., ÖCALAN Ö.

Communications in Applied Analysis , cilt.16, ss.113-129, 2012 (Hakemli Dergi)

Oscillation results of higher order nonlinear neutral delay differential equations

YILDIZ M. K., ÖCALAN Ö.

SELÇUK JOURNAL OF APPLİED MATHEMATİCS , cilt.11, ss.55-62, 2010 (Hakemli Dergi)

A generalization of Opial s inequality and applications to second order dynamic equations

Differential Equations and Dynamical Systems , cilt.18, ss.11-18, 2010 (Scopus)

Linearized oscillation of nonlinear difference equations with advanced arguments

Archivum Mathematicum , cilt.45, sa.3, ss.203-212, 2009 (Scopus)

Oscillation for higher order sublinear delay difference equation

YILDIZ M. K., ÖCALAN Ö.

Applied Mathematics E-Notes , cilt.9, ss.63-71, 2009 (Scopus)

Oscillation criteria for some classes of linear delay differential equations of first order

Bull. Inst. Math. Acad. Sin. (N.S.) , cilt.3, ss.293-314, 2008 (Hakemli Dergi)

Discrete approach on oscillation of difference equations with continuous variable

Advances in Dynamical Systems and Applications , cilt.3, ss.283-290, 2008 (Scopus)

Oscillation of higher order of system of difference equations with continuous arguments

ÖCALAN Ö., ÖZKAN U. M.

Selçuk J. Appl. Math. , cilt.9, sa.1, ss.23-29, 2008 (Hakemli Dergi)

Oscillation of nonlinear difference equations with several coefficients

Commun. Math. Anal. , cilt.4, sa.1, ss.35-44, 2008 (Hakemli Dergi)

Oscillation properties for advanced difference equations

ÖCALAN Ö., AKIN Ö.

Novi Sad Journal of Mathematics , cilt.37, sa.1, ss.39-47, 2007 (Scopus)

Oscillation criteria for systems of difference equations with variable coefficients

Appl. Math. E-Notes , cilt.6, sa.2006, ss.119-125, 2006 (Scopus)

Oscillations of difference equations with several terms