Abstract and Applied Analysis
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The latest articles from Hindawi Publishing Corporation
© 2016 , Hindawi Publishing Corporation . All rights reserved.

On Estimates of Deviation of Functions from Matrix Operators of Their Fourier Series by Some Expressions with Differences of the Entries
Sun, 22 May 2016 08:45:37 +0000
http://www.hindawi.com/journals/aaa/2016/9712878/
We generalize the results of Krasniqi 2012 and Wei and Yu 2012 to the case of differences.
Włodzimierz Łenski and Bogdan Szal
Copyright © 2016 Włodzimierz Łenski and Bogdan Szal. All rights reserved.

Certain Subclasses of Bistarlike and Biconvex Functions Based on QuasiSubordination
Thu, 28 Apr 2016 11:55:17 +0000
http://www.hindawi.com/journals/aaa/2016/3102960/
We introduce the unified biunivalent function class defined based on quasisubordination and obtained the coefficient estimates for TaylorMaclaurin coefficients and . Several related classes of functions are also considered and connections to earlier known and new results are established.
Nanjundan Magesh, Vitalrao Kupparao Balaji, and Jagadesan Yamini
Copyright © 2016 Nanjundan Magesh et al. All rights reserved.

Trigonometric and Hyperbolic Functions in Complex Domain
Wed, 27 Apr 2016 09:59:19 +0000
http://www.hindawi.com/journals/aaa/2016/3249439/
We study extension of trigonometric functions and and of hyperbolic functions and to complex domain. Our aim is to answer the question under what conditions on these functions satisfy wellknown relations for usual trigonometric and hyperbolic functions, such as, for example, . In particular, we prove in the paper that for the trigonometric and hyperbolic functions satisfy very analogous relations as their classical counterparts. Our methods are based on the theory of differential equations in the complex domain using the Maclaurin series for trigonometric and hyperbolic functions.
Petr Girg and Lukáš Kotrla
Copyright © 2016 Petr Girg and Lukáš Kotrla. All rights reserved.

A Computational Study of the Boundary Value Methods and the Block Unification Methods for
Mon, 11 Apr 2016 13:05:19 +0000
http://www.hindawi.com/journals/aaa/2016/8465103/
We derive a new class of linear multistep methods (LMMs) via the interpolation and collocation technique. We discuss the use of these methods as boundary value methods and block unification methods for the numerical approximation of the general secondorder initial and boundary value problems. The convergence of these families of methods is also established. Several test problems are given to show a computational comparison of these methods in terms of accuracy and the computational efficiency.
T. A. Biala
Copyright © 2016 T. A. Biala. All rights reserved.

Random FirstOrder Linear Discrete Models and Their Probabilistic Solution: A Comprehensive Study
Mon, 11 Apr 2016 11:32:49 +0000
http://www.hindawi.com/journals/aaa/2016/6372108/
This paper presents a complete stochastic solution represented by the first probability density function for random firstorder linear difference equations. The study is based on Random Variable Transformation method. The obtained results are given in terms of the probability density functions of the data, namely, initial condition, forcing term, and diffusion coefficient. To conduct the study, all possible cases regarding statistical dependence of the random input parameters are considered. A complete collection of illustrative examples covering all the possible scenarios is provided.
M.C. Casabán, J.C. Cortés, J.V. Romero, and M.D. Roselló
Copyright © 2016 M.C. Casabán et al. All rights reserved.

New Conditions for the Exponential Stability of Pseudolinear Difference Equations in Banach Spaces
Thu, 07 Apr 2016 06:06:10 +0000
http://www.hindawi.com/journals/aaa/2016/5098086/
We study the local exponential stability of evolution difference systems with slowly varying coefficients and nonlinear perturbations. We establish the robustness of the exponential stability in infinitedimensional Banach spaces, in the sense that the exponential stability for a given pseudolinear equation persists under sufficiently small perturbations. The main methodology is based on a combined use of new norm estimates for operatorvalued functions with the “freezing” method.
Rigoberto Medina
Copyright © 2016 Rigoberto Medina. All rights reserved.

The Viscosity Approximation ForwardBackward Splitting Method for Zeros of the Sum of Monotone Operators
Sun, 27 Mar 2016 11:44:04 +0000
http://www.hindawi.com/journals/aaa/2016/2371857/
We investigate the convergence analysis of the following general inexact algorithm for approximating a zero of the sum of a cocoercive operator and maximal monotone operators with : , for for given in a real Hilbert space , where , , and are sequences in with for all , denotes the error sequence, and is a contraction. The algorithm is known to converge under the following assumptions on and : (i) is bounded below away from 0 and above away from 1 and (ii) is summable in norm. In this paper, we show that these conditions can further be relaxed to, respectively, the following: (i) is bounded below away from 0 and above away from 3/2 and (ii) is square summable in norm; and we still obtain strong convergence results.
Oganeditse Aaron Boikanyo
Copyright © 2016 Oganeditse Aaron Boikanyo. All rights reserved.

Approximation of a Common Element of the Fixed Point Sets of Multivalued Strictly PseudocontractiveType Mappings and the Set of Solutions of an Equilibrium Problem in Hilbert Spaces
Wed, 16 Mar 2016 13:54:52 +0000
http://www.hindawi.com/journals/aaa/2016/3094838/
The strong convergence of a hybrid algorithm to a common element of the fixed point sets of multivalued strictly pseudocontractivetype mappings and the set of solutions of an equilibrium problem in Hilbert spaces is obtained using a strict fixed point set condition. The obtained results improve, complement, and extend the results on multivalued and singlevalued mappings in the contemporary literature.
F. O. Isiogugu
Copyright © 2016 F. O. Isiogugu. All rights reserved.

Tridiagonal Operators and Zeros of Polynomials in Two Variables
Wed, 16 Mar 2016 08:27:28 +0000
http://www.hindawi.com/journals/aaa/2016/6301413/
The aim of this paper is to connect the zeros of polynomials in two variables with the eigenvalues of a selfadjoint operator. This is done by use of a functionalanalytic method. The polynomials in two variables are assumed to satisfy a fiveterm recurrence relation, similar to the threeterm recurrence relation that the classical orthogonal polynomials satisfy.
Chrysi G. Kokologiannaki, Eugenia N. Petropoulou, and Dimitris Rizos
Copyright © 2016 Chrysi G. Kokologiannaki et al. All rights reserved.

Corrigendum to “A Note on the Use of Generalized Sundman Anomalies in the Numerical Integration of the Elliptical Orbital Motion”
Sun, 13 Mar 2016 12:32:29 +0000
http://www.hindawi.com/journals/aaa/2016/8037807/
José Antonio López Ortí, Francisco José Marco Castillo, and María José Martínez Usó
Copyright © 2016 José Antonio López Ortí et al. All rights reserved.

Existence of Infinitely Many Periodic Solutions for Perturbed Semilinear FourthOrder Impulsive Differential Inclusions
Sun, 06 Mar 2016 10:37:37 +0000
http://www.hindawi.com/journals/aaa/2016/5784273/
This paper discusses the existence of infinitely many periodic solutions for a semilinear fourthorder impulsive differential inclusion with a perturbed nonlinearity and two parameters. The approach is based on a critical point theorem for nonsmooth functionals.
Massimiliano Ferrara, Giuseppe Caristi, and Amjad Salari
Copyright © 2016 Massimiliano Ferrara et al. All rights reserved.

On the Property
Thu, 03 Mar 2016 06:55:45 +0000
http://www.hindawi.com/journals/aaa/2016/1256906/
We construct a continuous function such that possesses property, but does not have approximate derivative on a set of full Lebesgue measure. This shows that Banach’s Theorem concerning differentiability of continuous functions with Lusin’s property does not hold for property. Some relevant properties are presented.
Stanisław Kowalczyk and Małgorzata Turowska
Copyright © 2016 Stanisław Kowalczyk and Małgorzata Turowska. All rights reserved.

An Application of Potential Estimates to A Priori Bounds for Elliptic Equations
Wed, 24 Feb 2016 14:21:52 +0000
http://www.hindawi.com/journals/aaa/2016/6463030/
A potential estimate type approach is used in order to obtain some a priori bounds for the solutions of certain classes of Dirichlet problems associated with nondivergence structure elliptic equations.
Farman Mamedov, Sara Monsurrò, and Maria Transirico
Copyright © 2016 Farman Mamedov et al. All rights reserved.

Convex Sweeping Processes with Noncompact Perturbations and with Delay in Banach Spaces
Tue, 23 Feb 2016 13:56:19 +0000
http://www.hindawi.com/journals/aaa/2016/3853205/
We prove two results concerning the existence of solutions for functional differential inclusions that are governed by sweeping processes, with noncompact valued perturbations in Banach spaces. Indeed, we have two goals. The first is to give a technique that allows considering sweeping processes with noncompact valued perturbations and associated with a multivalued function depending on time. The second is to give a technique to overcome the arising problem from the nonlinearity of the normalized mappings, when we deal with sweeping processes with noncompact valued perturbations and associated with a multivalued function depending on time and state.
A. G. Ibrahim and F. Aladsani
Copyright © 2016 A. G. Ibrahim and F. Aladsani. All rights reserved.

Density by Moduli and Lacunary Statistical Convergence
Mon, 15 Feb 2016 12:02:30 +0000
http://www.hindawi.com/journals/aaa/2016/9365037/
We have introduced and studied a new concept of lacunary statistical convergence, where is an unbounded modulus. It is shown that, under certain conditions on a modulus , the concepts of lacunary strong convergence with respect to a modulus and lacunary statistical convergence are equivalent on bounded sequences. We further characterize those for which , where and denote the sets of all lacunary statistically convergent sequences and statistically convergent sequences, respectively. A general description of inclusion between two arbitrary lacunary methods of statistical convergence is given. Finally, we give an analog of the Cauchy criterion for convergence and a Tauberian theorem for convergence is also proved.
Vinod K. Bhardwaj and Shweta Dhawan
Copyright © 2016 Vinod K. Bhardwaj and Shweta Dhawan. All rights reserved.

Density by Moduli and Statistical Boundedness
Wed, 10 Feb 2016 09:01:33 +0000
http://www.hindawi.com/journals/aaa/2016/2143018/
We have generalized the notion of statistical boundedness by introducing the concept of statistical boundedness for scalar sequences where is an unbounded modulus. It is shown that bounded sequences are precisely those sequences which are statistically bounded for every unbounded modulus . A decomposition theorem for statistical convergence for vector valued sequences and a structure theorem for statistical boundedness have also been established.
Vinod K. Bhardwaj, Shweta Dhawan, and Sandeep Gupta
Copyright © 2016 Vinod K. Bhardwaj et al. All rights reserved.

Unbounded Solutions for Functional Problems on the HalfLine
Sun, 07 Feb 2016 14:01:32 +0000
http://www.hindawi.com/journals/aaa/2016/8987374/
This paper presents an existence and localization result of unbounded solutions for a secondorder differential equation on the halfline with functional boundary conditions. By applying unbounded upper and lower solutions, Green’s functions, and Schauder fixed point theorem, the existence of at least one solution is shown for the above problem. One example and one application to an EmdenFowler equation are shown to illustrate our results.
Hugo Carrasco and Feliz Minhós
Copyright © 2016 Hugo Carrasco and Feliz Minhós. All rights reserved.

Second Hankel Determinants for the Class of Typically Real Functions
Wed, 03 Feb 2016 09:18:26 +0000
http://www.hindawi.com/journals/aaa/2016/3792367/
We discuss the Hankel determinants for typically real functions, that is, analytic functions which satisfy the condition in the unit disk Δ. Main results are concerned with and . The sharp upper and lower bounds are given. In general case, for , the results are not sharp. Moreover, we present some remarks connected with typically real odd functions.
Paweł Zaprawa
Copyright © 2016 Paweł Zaprawa. All rights reserved.

Timelike Tangent Developable Surfaces and Bonnet Surfaces
Mon, 01 Feb 2016 06:56:19 +0000
http://www.hindawi.com/journals/aaa/2016/6837543/
A criterion was given for a timelike surface to be a Bonnet surface in 3dimensional Minkowski space by Chen and Li, 1999. In this study, we obtain a necessary and sufficient condition for a timelike tangent developable surface to be a timelike Bonnet surface by the aid of this criterion. This is examined under the condition of the curvature and torsion of the base curve of the timelike developable surface being nonconstant. Moreover, we investigate the nontrivial isometry preserving the mean curvature for a timelike flat helicoidal surface by considering the curvature and torsion of the base curve of the timelike developable surface as being constant.
Soley Ersoy and Kemal Eren
Copyright © 2016 Soley Ersoy and Kemal Eren. All rights reserved.

Behavior of the Solutions for PredatorPrey Dynamic Systems with BeddingtonDeAngelis Type Functional Response on Periodic Time Scales in Shifts
Wed, 27 Jan 2016 07:57:32 +0000
http://www.hindawi.com/journals/aaa/2016/1463043/
We consider twodimensional predatorprey system with BeddingtonDeAngelis type functional response on periodic time scales in shifts. For this special case we try to find under which conditions the system has periodic solution.
Neslihan Nesliye Pelen, Ayşe Feza Güvenilir, and Billur Kaymakçalan
Copyright © 2016 Neslihan Nesliye Pelen et al. All rights reserved.

Best Proximity Point Theorem in QuasiPseudometric Spaces
Sun, 24 Jan 2016 07:22:04 +0000
http://www.hindawi.com/journals/aaa/2016/9784592/
In quasipseudometric spaces (not necessarily sequentially complete), we continue the research on the quasigeneralized pseudodistances. We introduce the concepts of semiquasiclosed map and contraction of Nadler type with respect to generalized pseudodistances. Next, inspired by Abkar and Gabeleh we proved new best proximity point theorem in a quasipseudometric space. A best proximity point theorem furnishes sufficient conditions that ascertain the existence of an optimal solution to the problem of globally minimizing the error , and hence the existence of a consummate approximate solution to the equation .
Robert Plebaniak
Copyright © 2016 Robert Plebaniak. All rights reserved.

Exact Solutions of Travelling Wave Model via Dynamical System Method
Wed, 20 Jan 2016 07:05:38 +0000
http://www.hindawi.com/journals/aaa/2016/9290734/
By using the method of dynamical system, the exact travelling wave solutions of the coupled nonlinear SchrödingerBoussinesq equations are studied. Based on this method, the bounded exact travelling wave solutions are obtained which contain solitary wave solutions and periodic travelling wave solutions. The solitary wave solutions and periodic travelling wave solutions are expressed by the hyperbolic functions and the Jacobian elliptic functions, respectively. The results show that the presented findings improve the related previous conclusions. Furthermore, the numerical simulations of the solitary wave solutions and the periodic travelling wave solutions are given to show the correctness of our results.
Heng Wang, Longwei Chen, and Hongjiang Liu
Copyright © 2016 Heng Wang et al. All rights reserved.

Local Hypoellipticity by Lyapunov Function
Sun, 17 Jan 2016 13:57:47 +0000
http://www.hindawi.com/journals/aaa/2016/7210540/
We treat the local hypoellipticity, in the first degree, for a class of abstract differential operators complexes; the ones are given by the following differential operators: , , where is a selfadjoint linear operator, positive with , in a Hilbert space , and is a series of nonnegative powers of with coefficients in , being an open set of , for any , different from what happens in the work of Hounie (1979) who studies the problem only in the case . We provide sufficient condition to get the local hypoellipticity for that complex in the elliptic region, using a Lyapunov function and the dynamics properties of solutions of the Cauchy problem ′, , being the first coefficient of . Besides, to get over the problem out of the elliptic region, that is, in the points ∗ such that ∗ = 0, we will use the techniques developed by Bergamasco et al. (1993) for the particular operator .
E. R. AragãoCosta
Copyright © 2016 E. R. AragãoCosta. All rights reserved.

A Simplified Proof of Uncertainty Principle for Quaternion Linear Canonical Transform
Wed, 06 Jan 2016 11:20:21 +0000
http://www.hindawi.com/journals/aaa/2016/5874930/
We provide a short and simple proof of an uncertainty principle associated with the quaternion linear canonical transform (QLCT) by considering the fundamental relationship between the QLCT and the quaternion Fourier transform (QFT). We show how this relation allows us to derive the inverse transform and Parseval and Plancherel formulas associated with the QLCT. Some other properties of the QLCT are also studied.
Mawardi Bahri and Ryuichi Ashino
Copyright © 2016 Mawardi Bahri and Ryuichi Ashino. All rights reserved.

On a Degenerate Evolution System Associated with the Bean CriticalState for Type II Superconductors
Thu, 31 Dec 2015 06:34:38 +0000
http://www.hindawi.com/journals/aaa/2015/875190/
We study a degenerate evolution system containing the curl system in a bounded domain with initial and boundary conditions for the magnetic field under the influence of a system force . This is concerned with an approximation of Bean’s criticalstate model for type II superconductors. We will show the existence, uniqueness, and regularity of solutions. Moreover we will get the properties of the limit solution as .
Junichi Aramaki
Copyright © 2015 Junichi Aramaki. All rights reserved.

On Bleimann, Butzer, and HahnType Operators
Tue, 29 Dec 2015 13:19:59 +0000
http://www.hindawi.com/journals/aaa/2015/480925/
Sequence of Bleimann, Butzer, and Hahn operators which is based on a continuously differentiable function on , with , , has been considered. Uniform approximation by such a sequence has been studied and degree of approximation by the operators has been obtained. Moreover, shape preserving properties of the sequence of operators have been investigated.
Dilek Söylemez
Copyright © 2015 Dilek Söylemez. All rights reserved.

Existence and Uniqueness Results for Fractional Differential Equations with RiemannLiouville Fractional Integral Boundary Conditions
Tue, 29 Dec 2015 13:00:48 +0000
http://www.hindawi.com/journals/aaa/2015/290674/
We prove the existence and uniqueness of solution for fractional differential equations with RiemannLiouville fractional integral boundary conditions. The first existence and uniqueness result is based on Banach’s contraction principle. Moreover, other existence results are also obtained by using the Krasnoselskii fixed point theorem. An example is given to illustrate the main results.
Mohamed I. Abbas
Copyright © 2015 Mohamed I. Abbas. All rights reserved.

Generalized Variability Orderings among Nonnegative Fuzzy Random Variables
Tue, 29 Dec 2015 08:45:25 +0000
http://www.hindawi.com/journals/aaa/2015/757943/
The variability ordering for more and less variables of fuzzy random variables in terms of its distribution function is defined. A property of new better than used in expectation (NBUE) and new worse than used in expectation (NWUE) is derived as an application to the variability ordering of fuzzy random variables. The concept of generalized variability orderings of nonnegative fuzzy random variables representing lifetime of components is introduced. The domination is a generalized variability ordering. We proposed an integral inequality to the case of fuzzy random variables using ordering. The results included equivalent conditions which justify the generalized variability orderings.
S. Ramasubramanian and P. Mahendran
Copyright © 2015 S. Ramasubramanian and P. Mahendran. All rights reserved.

A Semilinear Wave Equation with a Boundary Condition of ManyPoint Type: Global Existence and Stability of Weak Solutions
Sun, 27 Dec 2015 07:29:03 +0000
http://www.hindawi.com/journals/aaa/2015/531872/
This paper is devoted to the study of a wave equation with a boundary condition of manypoint type. The existence of weak solutions is proved by using the Galerkin method. Also, the uniqueness and the stability of solutions are established.
Giai Giang Vo
Copyright © 2015 Giai Giang Vo. All rights reserved.

Positive Solutions for Nonlinear Fractional Difference Eigenvalue Problem with Nonlocal Conditions
Mon, 21 Dec 2015 06:25:15 +0000
http://www.hindawi.com/journals/aaa/2015/759378/
The problem of positive solutions for nonlinear fractional difference eigenvalue problem with nonlocal boundary conditions is investigated. Based on the fixed point index theory in cones, sufficient existence of positive solutions conditions is derived for the problem.
Wafa Shammakh and Maryam AlYami
Copyright © 2015 Wafa Shammakh and Maryam AlYami. All rights reserved.