International Journal of Differential Equations
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Critical Oscillation Constant for Euler Type HalfLinear Differential Equation Having MultiDifferent Periodic Coefficients
Mon, 27 Feb 2017 00:00:00 +0000
http://www.hindawi.com/journals/ijde/2017/5042421/
We compute explicitly the oscillation constant for Euler type halflinear secondorder differential equation having multidifferent periodic coefficients.
Adil Misir and Banu Mermerkaya
Copyright © 2017 Adil Misir and Banu Mermerkaya. All rights reserved.

Approximate Controllability of Semilinear Control System Using Tikhonov Regularization
Thu, 23 Feb 2017 00:00:00 +0000
http://www.hindawi.com/journals/ijde/2017/1684637/
For an approximately controllable semilinear system, the problem of computing control for a given target state is converted into an equivalent problem of solving operator equation which is illposed. We exhibit a sequence of regularized controls which steers the semilinear control system from an arbitrary initial state to an neighbourhood of the target state at time under the assumption that the nonlinear function is Lipschitz continuous. The convergence of the sequences of regularized controls and the corresponding mild solutions are shown under some assumptions on the system operators. It is also proved that the target state corresponding to the regularized control is close to the actual state to be attained.
Ravinder Katta and N. Sukavanam
Copyright © 2017 Ravinder Katta and N. Sukavanam. All rights reserved.

An AsymptoticNumerical Hybrid Method for Solving Singularly Perturbed Linear Delay Differential Equations
Wed, 08 Feb 2017 00:00:00 +0000
http://www.hindawi.com/journals/ijde/2017/7269450/
In this work, approximations to the solutions of singularly perturbed secondorder linear delay differential equations are studied. We firstly use twoterm Taylor series expansion for the delayed convection term and obtain a singularly perturbed ordinary differential equation (ODE). Later, an efficient and simple asymptotic method so called Successive Complementary Expansion Method (SCEM) is employed to obtain a uniformly valid approximation to this corresponding singularly perturbed ODE. As the final step, we employ a numerical procedure to solve the resulting equations that come from SCEM procedure. In order to show efficiency of this numericalasymptotic hybrid method, we compare the results with exact solutions if possible; if not we compare with the results that are obtained by other reported methods.
Süleyman Cengizci
Copyright © 2017 Süleyman Cengizci. All rights reserved.

Existence and Uniqueness of Solutions for BVP of Nonlinear Fractional Differential Equation
Sun, 29 Jan 2017 00:00:00 +0000
http://www.hindawi.com/journals/ijde/2017/4683581/
In this paper, we study the existence and uniqueness of solutions for the following boundary value problem of nonlinear fractional differential equation: , , , where , , , and . The main tools used are nonlinear alternative of LeraySchauder type and Banach contraction principle.
ChengMin Su, JianPing Sun, and YaHong Zhao
Copyright © 2017 ChengMin Su et al. All rights reserved.

Asymptotics for the OstrovskyHunter Equation in the Critical Case
Mon, 23 Jan 2017 12:00:01 +0000
http://www.hindawi.com/journals/ijde/2017/3879017/
We consider the Cauchy problem for the OstrovskyHunter equation , , , , where . Define . Suppose that is a pseudodifferential operator with a symbol such that , , and . For example, we can take . We prove the global in time existence and the large time asymptotic behavior of solutions.
Fernando BernalVílchis, Nakao Hayashi, and Pavel I. Naumkin
Copyright © 2017 Fernando BernalVílchis et al. All rights reserved.

A Trigonometrically Fitted Block Method for Solving Oscillatory SecondOrder Initial Value Problems and Hamiltonian Systems
Sun, 22 Jan 2017 13:47:16 +0000
http://www.hindawi.com/journals/ijde/2017/9293530/
In this paper, we present a block hybrid trigonometrically fitted RungeKuttaNyström method (BHTRKNM), whose coefficients are functions of the frequency and the stepsize for directly solving general secondorder initial value problems (IVPs), including Hamiltonian systems such as the energy conserving equations and systems arising from the semidiscretization of partial differential equations (PDEs). Four discrete hybrid formulas used to formulate the BHTRKNM are provided by a continuous onestep hybrid trigonometrically fitted method with an offgrid point. We implement BHTRKNM in a blockbyblock fashion; in this way, the method does not suffer from the disadvantages of requiring starting values and predictors which are inherent in predictorcorrector methods. The stability property of the BHTRKNM is discussed and the performance of the method is demonstrated on some numerical examples to show accuracy and efficiency advantages.
F. F. Ngwane and S. N. Jator
Copyright © 2017 F. F. Ngwane and S. N. Jator. All rights reserved.

A Family of Boundary Value Methods for Systems of SecondOrder Boundary Value Problems
Sun, 15 Jan 2017 13:29:21 +0000
http://www.hindawi.com/journals/ijde/2017/2464759/
A family of boundary value methods (BVMs) with continuous coefficients is derived and used to obtain methods which are applied via the block unification approach. The methods obtained from these continuous BVMs are weighted the same and are used to simultaneously generate approximations to the exact solution of systems of secondorder boundary value problems (BVPs) on the entire interval of integration. The convergence of the methods is analyzed. Numerical experiments were performed to show efficiency and accuracy advantages.
T. A. Biala and S. N. Jator
Copyright © 2017 T. A. Biala and S. N. Jator. All rights reserved.

Modelling the Potential Role of Media Campaigns in Ebola Transmission Dynamics
Thu, 12 Jan 2017 14:34:31 +0000
http://www.hindawi.com/journals/ijde/2017/3758269/
A sixcompartment mathematical model is formulated to investigate the role of media campaigns in Ebola transmission dynamics. The model includes tweets or messages sent by individuals in different compartments. The media campaigns reproduction number is computed and used to discuss the stability of the disease states. The presence of a backward bifurcation as well as a forward bifurcation is shown together with the existence and local stability of the endemic equilibrium. Results show that messages sent through media have a more significant beneficial effect on the reduction of Ebola cases if they are more effective and spaced out.
Sylvie Diane Djiomba Njankou and Farai Nyabadza
Copyright © 2017 Sylvie Diane Djiomba Njankou and Farai Nyabadza. All rights reserved.

Numerical Solution of Piecewise Constant Delay Systems Based on a Hybrid Framework
Thu, 29 Dec 2016 14:07:02 +0000
http://www.hindawi.com/journals/ijde/2016/9754906/
An efficient numerical scheme for solving delay differential equations with a piecewise constant delay function is developed in this paper. The proposed approach is based on a hybrid of blockpulse functions and Taylor’s polynomials. The operational matrix of delay corresponding to the proposed hybrid functions is introduced. The sparsity of this matrix significantly reduces the computation time and memory requirement. The operational matrices of integration, delay, and product are employed to transform the problem under consideration into a system of algebraic equations. It is shown that the developed approach is also applicable to a special class of nonlinear piecewise constant delay differential equations. Several numerical experiments are examined to verify the validity and applicability of the presented technique.
H. R. Marzban and S. Hajiabdolrahmani
Copyright © 2016 H. R. Marzban and S. Hajiabdolrahmani. All rights reserved.

Some Comparison of Solutions by Different Numerical Techniques on Mathematical Biology Problem
Wed, 07 Dec 2016 11:33:01 +0000
http://www.hindawi.com/journals/ijde/2016/8921710/
We try to compare the solutions by some numerical techniques when we apply the methods on some mathematical biology problems. The RungeKuttaFehlberg (RKF) method is a promising method to give an approximate solution of nonlinear ordinary differential equation systems, such as a model for insect population, onespecies LotkaVolterra model. The technique is described and illustrated by numerical examples. We modify the population models by taking the Holling type III functional response and intraspecific competition term and hence we solve it by this numerical technique and show that RKF method gives good results. We try to compare this method with the Laplace Adomian Decomposition Method (LADM) and with the exact solutions.
Susmita Paul, Sankar Prasad Mondal, Paritosh Bhattacharya, and Kripasindhu Chaudhuri
Copyright © 2016 Susmita Paul et al. All rights reserved.

Existence of Solutions for Fractional Impulsive Integrodifferential Equations in Banach Spaces
Tue, 06 Dec 2016 08:48:47 +0000
http://www.hindawi.com/journals/ijde/2016/5648798/
We investigate the existence of solutions for a class of impulsive fractional evolution equations with nonlocal conditions in Banach space by using some fixed point theorems combined with the technique of measure of noncompactness. Our results improve and generalize some known results corresponding to those obtained by others. Finally, two applications are given to illustrate that our results are valuable.
Haide Gou and Baolin Li
Copyright © 2016 Haide Gou and Baolin Li. All rights reserved.

The Dynamical Analysis of a PreyPredator Model with a RefugeStage Structure Prey Population
Thu, 24 Nov 2016 07:48:20 +0000
http://www.hindawi.com/journals/ijde/2016/2010464/
We proposed and analyzed a mathematical model dealing with two species of preypredator system. It is assumed that the prey is a stage structure population consisting of two compartments known as immature prey and mature prey. It has a refuge capability as a defensive property against the predation. The existence, uniqueness, and boundedness of the solution of the proposed model are discussed. All the feasible equilibrium points are determined. The local and global stability analysis of them are investigated. The occurrence of local bifurcation (such as saddle node, transcritical, and pitchfork) near each of the equilibrium points is studied. Finally, numerical simulations are given to support the analytic results.
Raid Kamel Naji and Salam Jasim Majeed
Copyright © 2016 Raid Kamel Naji and Salam Jasim Majeed. All rights reserved.

About a Problem for Loaded ParabolicHyperbolic Type Equation with Fractional Derivatives
Wed, 23 Nov 2016 06:07:26 +0000
http://www.hindawi.com/journals/ijde/2016/9815796/
An existence and uniqueness of solution of local boundary value problem with discontinuous matching condition for the loaded parabolichyperbolic equation involving the Caputo fractional derivative and RiemannLiouville integrals have been investigated. The uniqueness of solution is proved by the method of integral energy and the existence is proved by the method of integral equations. Let us note that, from this problem, the same problem follows with continuous gluing conditions (at ); thus an existence theorem and uniqueness theorem will be correct and on this case.
Kishin B. Sadarangani and Obidjon Kh. Abdullaev
Copyright © 2016 Kishin B. Sadarangani and Obidjon Kh. Abdullaev. All rights reserved.

Piecewise Approximate Analytical Solutions of HighOrder Singular Perturbation Problems with a Discontinuous Source Term
Tue, 15 Nov 2016 06:04:00 +0000
http://www.hindawi.com/journals/ijde/2016/1015634/
A reliable algorithm is presented to develop piecewise approximate analytical solutions of third and fourthorder convection diffusion singular perturbation problems with a discontinuous source term. The algorithm is based on an asymptotic expansion approximation and Differential Transform Method (DTM). First, the original problem is transformed into a weakly coupled system of ODEs and a zeroorder asymptotic expansion of the solution is constructed. Then a piecewise smooth solution of the terminal value reduced system is obtained by using DTM and imposing the continuity and smoothness conditions. The error estimate of the method is presented. The results show that the method is a reliable and convenient asymptotic semianalytical numerical method for treating highorder singular perturbation problems with a discontinuous source term.
Essam R. ElZahar
Copyright © 2016 Essam R. ElZahar. All rights reserved.

Positive Solutions to Periodic Boundary Value Problems of Nonlinear Fractional Differential Equations at Resonance
Wed, 09 Nov 2016 09:26:56 +0000
http://www.hindawi.com/journals/ijde/2016/9260726/
By LeggettWilliams normtype theorem for coincidences due to O’Regan and Zima, we discuss the existence of positive solutions to fractional order with periodic boundary conditions at resonance. At last, an example is presented to demonstrate the main results.
Lei Hu
Copyright © 2016 Lei Hu. All rights reserved.

Multiplicity Results for the Laplacian Equation with Singular Nonlinearities and Nonlinear Neumann Boundary Condition
Mon, 07 Nov 2016 14:15:31 +0000
http://www.hindawi.com/journals/ijde/2016/3149482/
We investigate the singular Neumann problem involving the Laplace operator: , in , where is a bounded domain with boundary, is a positive parameter, and , and are assumed to satisfy assumptions (H0)–(H5) in the Introduction. Using some variational techniques, we show the existence of a number such that problem has two solutions for one solution for , and no solutions for .
K. Saoudi, M. Kratou, and S. Alsadhan
Copyright © 2016 K. Saoudi et al. All rights reserved.

Dirichlet Boundary Value Problem for the Second Order Asymptotically Linear System
Thu, 03 Nov 2016 12:45:41 +0000
http://www.hindawi.com/journals/ijde/2016/5676217/
We consider the second order system with the Dirichlet boundary conditions , where the vector field is asymptotically linear and . We provide the existence and multiplicity results using the vector field rotation theory.
A. Gritsans, F. Sadyrbaev, and I. Yermachenko
Copyright © 2016 A. Gritsans et al. All rights reserved.

Error Analysis of an Implicit Spectral Scheme Applied to the SchrödingerBenjaminOno System
Thu, 03 Nov 2016 06:28:50 +0000
http://www.hindawi.com/journals/ijde/2016/6930758/
We develop error estimates of the semidiscrete and fully discrete formulations of a FourierGalerkin numerical scheme to approximate solutions of a coupled nonlinear SchrödingerBenjaminOno system that describes the motion of two fluids with different densities under capillarygravity waves in a deep water regime. The accuracy of the numerical solver is checked using some exact travelling wave solutions of the system.
Juan Carlos Muñoz Grajales
Copyright © 2016 Juan Carlos Muñoz Grajales. All rights reserved.

A Numerical Computation of a System of Linear and Nonlinear Time Dependent Partial Differential Equations Using Reduced Differential Transform Method
Thu, 27 Oct 2016 12:49:12 +0000
http://www.hindawi.com/journals/ijde/2016/4275389/
This paper deals with an analytical solution of an initial value system of time dependent linear and nonlinear partial differential equations by implementing reduced differential transform (RDT) method. The effectiveness and the convergence of RDT method are tested by means of five test problems, which indicates the validity and great potential of the reduced differential transform method for solving system of partial differential equations.
Brajesh Kumar Singh and Mahendra
Copyright © 2016 Brajesh Kumar Singh and Mahendra. All rights reserved.

Multiple Solutions for the Asymptotically Linear Kirchhoff Type Equations on
Thu, 13 Oct 2016 12:44:41 +0000
http://www.hindawi.com/journals/ijde/2016/9503073/
The multiplicity of positive solutions for Kirchhoff type equations depending on a nonnegative parameter on is proved by using variational method. We will show that if the nonlinearities are asymptotically linear at infinity and is sufficiently small, the Kirchhoff type equations have at least two positive solutions. For the perturbed problem, we give the result of existence of three positive solutions.
Yu Duan and ChunLei Tang
Copyright © 2016 Yu Duan and ChunLei Tang. All rights reserved.

On Accuracy and Stability Analysis of the Reproducing Kernel Space Method for the Forced Duffing Equation
Tue, 11 Oct 2016 07:32:49 +0000
http://www.hindawi.com/journals/ijde/2016/3520815/
It is attempted to provide the stability and convergence analysis of the reproducing kernel space method for solving the Duffing equation with with boundary integral conditions. We will prove that the reproducing space method is stable. Moreover, after introducing the method, it is shown that it has convergence order two.
Bahram Asadi and Taher Lotfi
Copyright © 2016 Bahram Asadi and Taher Lotfi. All rights reserved.

The Maximal Strichartz Family of Gaussian Distributions: Fisher Information, Index of Dispersion, and Stochastic Ordering
Thu, 29 Sep 2016 09:49:30 +0000
http://www.hindawi.com/journals/ijde/2016/2343975/
We define and study several properties of what we call Maximal Strichartz Family of Gaussian Distributions. This is a subfamily of the family of Gaussian Distributions that arises naturally in the context of the Linear Schrödinger Equation and Harmonic Analysis, as the set of maximizers of certain norms introduced by Strichartz. From a statistical perspective, this family carries with itself some extrastructure with respect to the general family of Gaussian Distributions. In this paper, we analyse this extrastructure in several ways. We first compute the Fisher Information Matrix of the family, then introduce some measures of statistical dispersion, and, finally, introduce a Partial Stochastic Order on the family. Moreover, we indicate how these tools can be used to distinguish between distributions which belong to the family and distributions which do not. We show also that all our results are in accordance with the dispersive PDE nature of the family.
Alessandro Selvitella
Copyright © 2016 Alessandro Selvitella. All rights reserved.

A Hybrid Natural Transform Homotopy Perturbation Method for Solving Fractional Partial Differential Equations
Tue, 27 Sep 2016 15:42:46 +0000
http://www.hindawi.com/journals/ijde/2016/9207869/
A hybrid analytical method for solving linear and nonlinear fractional partial differential equations is presented. The proposed analytical approach is an elegant combination of the Natural Transform Method (NTM) and a wellknown method, Homotopy Perturbation Method (HPM). In this analytical method, the fractional derivative is computed in Caputo sense and the nonlinear term is calculated using He’s polynomial. The proposed analytical method reduces the computational size and avoids roundoff errors. Exact solution of linear and nonlinear fractional partial differential equations is successfully obtained using the analytical method.
Shehu Maitama
Copyright © 2016 Shehu Maitama. All rights reserved.

Symmetry Classification and Exact Solutions of a Variable Coefficient SpaceTime Fractional Potential Burgers’ Equation
Sun, 25 Sep 2016 12:24:40 +0000
http://www.hindawi.com/journals/ijde/2016/4270724/
We investigate the symmetry properties of a variable coefficient spacetime fractional potential Burgers’ equation. Fractional Lie symmetries and corresponding infinitesimal generators are obtained. With the help of the infinitesimal generators, some group invariant solutions are deduced. Further, some exact solutions of fractional potential Burgers’ equation are generated by the invariant subspace method.
Manoj Gaur and K. Singh
Copyright © 2016 Manoj Gaur and K. Singh. All rights reserved.

HomogeneousLike Generalized Cubic Systems
Mon, 05 Sep 2016 11:26:55 +0000
http://www.hindawi.com/journals/ijde/2016/7640340/
We consider properties and center conditions for plane polynomial systems of the forms , where , and , are polynomials of degrees and , respectively, for integers . We restrict our attention to those systems for which . In this case the system can be transformed to a trigonometric Abel equation which is similar in form to the one obtained for homogeneous systems . From this we show that any center condition of a homogeneous system for a given can be transformed to a center condition of the corresponding generalized cubic system and we use a similar idea to obtain center conditions for several other related systems. As in the case of the homogeneous system, these systems can also be transformed to Abel equations having rational coefficients and we briefly discuss an application of this to a particular Abel equation.
G. R. Nicklason
Copyright © 2016 G. R. Nicklason. All rights reserved.

On Oscillatory and Asymptotic Behavior of a SecondOrder Nonlinear Damped Neutral Differential Equation
Mon, 29 Aug 2016 16:25:02 +0000
http://www.hindawi.com/journals/ijde/2016/3746368/
This paper discusses oscillatory and asymptotic properties of solutions of a class of secondorder nonlinear damped neutral differential equations. Some new sufficient conditions for any solution of the equation to be oscillatory or to converge to zero are given. The results obtained extend and improve some of the related results reported in the literature. The results are illustrated with examples.
Ercan Tunç and Said R. Grace
Copyright © 2016 Ercan Tunç and Said R. Grace. All rights reserved.

Estimates on the Lower Bound of the Eigenvalue of the Smallest Modulus Associated with a General Weighted SturmLiouville Problem
Mon, 29 Aug 2016 09:28:25 +0000
http://www.hindawi.com/journals/ijde/2016/7396951/
We obtain a lower bound on the eigenvalue of smallest modulus associated with a Dirichlet problem in the general case of a regular SturmLiouville problem. The main motivation for this study is the result obtained by Mingarelli (1988).
Mervis Kikonko and Angelo Bernado Mingarelli
Copyright © 2016 Mervis Kikonko and Angelo Bernado Mingarelli. All rights reserved.

Interval Oscillation Criteria for Forced SecondOrder Nonlinear Delay Dynamic Equations with Damping and Oscillatory Potential on Time Scales
Wed, 24 Aug 2016 17:53:57 +0000
http://www.hindawi.com/journals/ijde/2016/3298289/
We are concerned with the interval oscillation of general type of forced secondorder nonlinear dynamic equation with oscillatory potential of the form , on a time scale . We will use a unified approach on time scales and employ the Riccati technique to establish some oscillation criteria for this type of equations. Our results are more general and extend the oscillation criteria of Erbe et al. (2010). Also our results unify the oscillation of the forced secondorder nonlinear delay differential equation and the forced secondorder nonlinear delay difference equation. Finally, we give some examples to illustrate our results.
Hassan A. Agwa, Ahmed M. M. Khodier, and Heba A. Hassan
Copyright © 2016 Hassan A. Agwa et al. All rights reserved.

Semianalytic Solution of SpaceTime Fractional Diffusion Equation
Mon, 08 Aug 2016 09:59:49 +0000
http://www.hindawi.com/journals/ijde/2016/2371837/
We study the spacetime fractional diffusion equation with spatial RieszFeller fractional derivative and Caputo fractional time derivative. The continuation of the solution of this fractional equation to the solution of the corresponding integer order equation is proved. The series solution of this problem is obtained via the optimal homotopy analysis method (OHAM). Numerical simulations are presented to validate the method and to show the effect of changing the fractional derivative parameters on the solution behavior.
A. Elsaid, S. Shamseldeen, and S. Madkour
Copyright © 2016 A. Elsaid et al. All rights reserved.

A Comparison Principle for the Mean Curvature Flow Equation with Discontinuous Coefficients
Thu, 04 Aug 2016 14:17:44 +0000
http://www.hindawi.com/journals/ijde/2016/3627896/
We study the level set equation in a bounded domain when the velocity of the interface is given by the mean curvature plus a discontinuous velocity. We prove a comparison principle for the initialboundary value problem whose consequence is uniqueness of continuous solutions and well posedness of the level set method.
Cecilia De Zan and Pierpaolo Soravia
Copyright © 2016 Cecilia De Zan and Pierpaolo Soravia. All rights reserved.