Doğan, Abdülkadir
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Abdulkadir DOĞAN Dogan, A. Dogan, Abdulkadir Doǧan, Abdülkadir Muhittin
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Prof. Dr.
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abdulkadir.dogan@agu.edu.tr
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02.01. Mühendislik Bilimleri
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21 results
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Now showing 1 - 10 of 21
Article Existence of Positive Solutions for Nonlinear Multipoint P-Laplacian Dynamic Equations on Time Scales(Tubitak Scientific & Technological Research Council Turkey, 2020-05-08) Dogan, AbdulkadirIn this paper, we investigate the existence of positive solutions for nonlinear multipoint boundary value problems for p-Laplacian dynamic equations on time scales with the delta derivative of the nonlinear term. Sufficient assumptions are obtained for existence of at least twin or arbitrary even positive solutions to some boundary value problems. Our results are achieved by appealing to the fixed point theorems of Avery-Henderson. As an application, an example to demonstrate our results is given.Article Multiple Positive Solutions of Nonlinear M-Point Dynamic Equations for P-Laplacian on Time Scales(Tubitak Scientific & Technological Research Council Turkey, 2016) Dogan, AbdulkadirIn this paper, we study the existence of positive solutions of a nonlinear m-point p-Laplacian dynamic equation (phi(p) (x(Delta)(t)))(del) w(t)f (t,x(t), x(Delta)(t)) = 0, t(1) < m-1 X(ti) - B-0 (Sigma m-1 i=2 a(i)x(Delta)(t(i))) = 0, x(Delta) (tm) = 0, or x(Delta)(t(1)) - 0, x(t(m)) + B-1(Sigma m-1 i=2 b(i)s(Delta)(t(i))) -0, where phi(p)(s) =vertical bar s vertical bar(P-2) s, p > 1. Sufficient conditions for the existence of at least three positive solutions of the problem are obtained by using a fixed point theorem. The interesting point is the nonlinear term f is involved with the first order derivative explicitly. As an application, an example is given to illustrate the result.Article Citation - WoS: 7Citation - Scopus: 5On the Existence of Positive Solutions for the Second-Order Boundary Value Problem(Pergamon-Elsevier Science Ltd, 2015-11) Dogan, AbdulkadirThis paper is concerned with the existence of positive solutions to a second order boundary value problem. By imposing growth conditions on f and using a generalization of the Leggett-Williams fixed point theorem, we prove the existence of at least three symmetric positive solutions. (C) 2015 Elsevier Ltd. All rights reserved.Article Citation - WoS: 1Citation - Scopus: 10Existence of Three Positive Solutions for an M-Point Boundary-Value Problem on Time Scales(Texas State Univ, 2013) Dogan, AbdulkadirWe study an m-point boundary-value problem on times scales. By using a fixed point theorem, we prove the existence of at least three positive solutions, under suitable growth conditions imposed on the nonlinear term. An example is given to illustrate our results.Article Citation - WoS: 7Citation - Scopus: 9On the Existence of Positive Solutions of the P-Laplacian Dynamic Equations on Time Scales(Wiley, 2017-01-26) Dogan, AbdulkadirIn this paper, we investigate the existence of positive solutions for a nonlinear m-point boundary value problem for the p-Laplacian dynamic equations on time scales, by applying a Krasnosel'skii's fixed point theorem. As an application, an example is included to demonstrate themain results. Copyright (C) 2017 John Wiley & Sons, Ltd.Article Citation - WoS: 1Citation - Scopus: 1Triple Positive Solutions of M-Point Boundary Value Problem on Time Scales With P-Laplacian(Iranian Mathematical Soc, 2017) Dogan, A.In this paper, we consider the multipoint boundary value problem for one-dimensional p-Laplacian dynamic equation on time scales. We prove the existence at least three positive solutions of the boundary value problem by using the Avery and Peterson fixed point theorem. The interesting point is that the non-linear term f involves a first-order derivative explicitly. Our results are new for the special cases of difference equations and differential equations as well as in the general time scale setting.Article Citation - WoS: 10Citation - Scopus: 12Positive Solutions of the P-Laplacian Dynamic Equations on Time Scales With Sign Changing Nonlinearity(Texas State Univ, 2018) Dogan, AbdulkadirThis article concerns the existence of positive solutions for p-Laplacian boundary value problem on time scales. By applying fixed point index we obtain the existence of solutions. Emphasis is put on the fact that the nonlinear term is allowed to change sign. An example illustrates our results.Article Citation - WoS: 17Citation - Scopus: 13Existence of Multiple Positive Solutions for P-Laplacian Multipoint Boundary Value Problems on Time Scales(Springeropen, 2013-08-07) Dogan, AbdulkadirIn this paper, we consider p-Laplacian multipoint boundary value problems on time scales. By using a generalization of the Leggett-Williams fixed point theorem due to Bai and Ge, we prove that a boundary value problem has at least three positive solutions. Moreover, we study existence of positive solutions of a multipoint boundary value problem for an increasing homeomorphism and homomorphism on time scales. By using fixed point index theory, sufficient conditions for the existence of at least two positive solutions are provided. Examples are given to illustrate the results. MSC: 34B15, 34B16, 34B18, 39A10.Article Citation - WoS: 1Citation - Scopus: 1Existence Results for a Class of Boundary Value Problems for Fractional Differential Equations(Tubitak Scientific & Technological Research Council Turkey, 2021-05-20) Dogan, AbdulkadirBy application of some fixed point theorems, that is, the Banach fixed point theorem, Schaefer's and the LeraySchauder fixed point theorem, we establish new existence results of solutions to boundary value problems of fractional differential equations. This paper is motivated by Agarwal et al. (Georgian Math. J. 16 (2009) No.3, 401-411).Article Citation - WoS: 7Citation - Scopus: 7Positive Solutions of Nonlinear Multi-Point Boundary Value Problems(Springer, 2018-05-17) Dogan, AbdulkadirThis paper deals with the existence of positive solutions of nonlinear differential equation subject to the boundary conditions By using Schauder's fixed point theorem, we show that it has at least one positive solution if f is nonnegative and continuous. Positive solutions of the above boundary value problem satisfy theHarnack inequality inf(0 <= t <= 1) u(t) >= gamma parallel to u parallel to(infinity.)
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