International Journal of Analysis
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The latest articles from Hindawi Publishing Corporation
© 2016 , Hindawi Publishing Corporation . All rights reserved.

Some New Ostrwoski’s Inequalities for Functions Whose th Derivatives Are Convex
Mon, 28 Nov 2016 13:41:13 +0000
http://www.hindawi.com/journals/ijanal/2016/6749213/
We prove some new Ostrowski’s inequalities for functions whose th derivatives are convex.
Badreddine Meftah
Copyright © 2016 Badreddine Meftah. All rights reserved.

Coefficient Estimates for Certain Subclasses of Biunivalent Functions Defined by Convolution
Tue, 22 Nov 2016 14:36:34 +0000
http://www.hindawi.com/journals/ijanal/2016/6958098/
We introduce two new subclasses of the function class of biunivalent functions in the open disc defined by convolution. Estimates on the coefficients and for the two subclasses are obtained. Moreover, we verify Brannan and Clunie’s conjecture for our subclasses.
R. Vijaya, T. V. Sudharsan, and S. Sivasubramanian
Copyright © 2016 R. Vijaya et al. All rights reserved.

Multiplicity of Solutions for Schrödinger Equations with ConcaveConvex Nonlinearities
Tue, 22 Nov 2016 09:39:02 +0000
http://www.hindawi.com/journals/ijanal/2016/8350396/
We study the multiplicity of solutions for a class of semilinear Schrödinger equations: where satisfies some kind of coercive condition and involves concaveconvex nonlinearities with indefinite signs. Our theorems contain some new nonlinearities.
DongLun Wu, ChunLei Tang, and XingPing Wu
Copyright © 2016 DongLun Wu et al. All rights reserved.

A Generalization on Weighted Means and Convex Functions with respect to the NonNewtonian Calculus
Tue, 22 Nov 2016 09:32:28 +0000
http://www.hindawi.com/journals/ijanal/2016/5416751/
This paper is devoted to investigating some characteristic features of weighted means and convex functions in terms of the nonNewtonian calculus which is a selfcontained system independent of any other system of calculus. It is shown that there are infinitely many such useful types of weighted means and convex functions depending on the choice of generating functions. Moreover, some relations between classical weighted mean and its nonNewtonian version are compared and discussed in a table. Also, some geometric interpretations of convex functions are presented with respect to the nonNewtonian slope. Finally, using multiplicative continuous convex functions we give an application.
Uğur Kadak and Yusuf Gürefe
Copyright © 2016 Uğur Kadak and Yusuf Gürefe. All rights reserved.

Strong Convexity and Separation Theorems
Thu, 10 Nov 2016 11:15:46 +0000
http://www.hindawi.com/journals/ijanal/2016/7160348/
Jensen inequality for strongly convex functions and a characterization of pairs of functions that can be separated by a strongly convex function are presented. As a consequence, a stability result of the HyersUlam type is obtained.
Teodoro Lara, Nelson Merentes, and Kazimierz Nikodem
Copyright © 2016 Teodoro Lara et al. All rights reserved.

Straightforward Proofs of Ostrowski Inequality and Some Related Results
Wed, 09 Nov 2016 09:39:22 +0000
http://www.hindawi.com/journals/ijanal/2016/3918483/
We give proofs of some known results in very simple and antique way. Also we find some general bounds of a nonnegative difference of the Hadamard inequality and an OstrowskiGrüss type inequality is proved.
Ghulam Farid
Copyright © 2016 Ghulam Farid. All rights reserved.

On the Marginal Distribution of the Diagonal Blocks in a Blocked Wishart Random Matrix
Tue, 01 Nov 2016 06:27:22 +0000
http://www.hindawi.com/journals/ijanal/2016/5967218/
Let be a blocked Wishart random matrix with diagonal blocks of orders and . The goal of the paper is to find the exact marginal distribution of the two diagonal blocks of . We find an expression for this marginal density involving the matrixvariate generalized hypergeometric function. We became interested in this problem because of an application in spatial interpolation of random fields of positive definite matrices, where this result will be used for parameter estimation, using composite likelihood methods.
Kjetil B. Halvorsen, Victor Ayala, and Eduardo Fierro
Copyright © 2016 Kjetil B. Halvorsen et al. All rights reserved.

Inclusion of the Generalized Bessel Functions in the Janowski Class
Thu, 27 Oct 2016 12:27:22 +0000
http://www.hindawi.com/journals/ijanal/2016/4740819/
Sufficient conditions on , , , , and are determined that will ensure the generalized Bessel function satisfies the subordination . In particular this gives conditions for , , to be closetoconvex. Also, conditions for to be Janowski convex and to be Janowski starlike in the unit disk are obtained.
Saiful R. Mondal and Mohammed Al Dhuain
Copyright © 2016 Saiful R. Mondal and Mohammed Al Dhuain. All rights reserved.

HermiteHadamard Type Inequalities Obtained via Fractional Integral for Differentiable Convex and Convex Functions
Thu, 20 Oct 2016 06:51:24 +0000
http://www.hindawi.com/journals/ijanal/2016/4765691/
Some HermiteHadamard type inequalities involving fractional integrals for convex and ()convex functions are obtained.
Erhan Set, Süleyman Sami Karataş, and Muhammad Adil Khan
Copyright © 2016 Erhan Set et al. All rights reserved.

Common Fixed Point Results for Six Mappings via Integral Contractions with Applications
Wed, 19 Oct 2016 07:14:20 +0000
http://www.hindawi.com/journals/ijanal/2016/7480469/
Common fixed point theorems for six selfmappings under integral type inequality satisfying and properties in the context of complex valued metric space (not necessarily complete) are established. The derived results are new even for ordinary metric spaces. We prove existence result for optimal unique solution of the system of functional equations used in dynamical programming with complex domain.
Mian Bahadur Zada, Muhammad Sarwar, and Nayyar Mehmood
Copyright © 2016 Mian Bahadur Zada et al. All rights reserved.

Some Nonlinear Stochastic Cauchy Problems with Generalized Stochastic Processes
Tue, 18 Oct 2016 13:38:27 +0000
http://www.hindawi.com/journals/ijanal/2016/5963420/
We study some nonlinear stochastic Cauchy problems in the framework of the algebras. We adapt the definitions to this framework. By means of suitable regularizations, we define associated generalized problems. We use our previous results about the wave equation in canonical form to obtain generalized solutions. We compare the generalized solutions with the classical ones when they exist.
Victor Dévoué
Copyright © 2016 Victor Dévoué. All rights reserved.

HyersUlam Stability of Fractional Nabla Difference Equations
Wed, 21 Sep 2016 11:42:44 +0000
http://www.hindawi.com/journals/ijanal/2016/7265307/
We investigate the HyersUlam stability, the generalized HyersUlam stability, and the HyersUlam stability of a linear fractional nabla difference equation using discrete Laplace transform. We provide a few examples to illustrate the applicability of established results.
Jagan Mohan Jonnalagadda
Copyright © 2016 Jagan Mohan Jonnalagadda. All rights reserved.

On Faster Implicit Hybrid KirkMultistep Schemes for ContractiveType Operators
Mon, 19 Sep 2016 14:22:04 +0000
http://www.hindawi.com/journals/ijanal/2016/3791506/
The purpose of this paper is to prove strong convergence and Tstability results of some modified hybrid KirkMultistep iterations for contractivetype operator in normed linear spaces. Our results show through analytical and numerical approach that the modified hybrid schemes are better in terms of convergence rate than other hybrid KirkMultistep iterative schemes in the literature.
O. T. Wahab and K. Rauf
Copyright © 2016 O. T. Wahab and K. Rauf. All rights reserved.

VariationalLike Inequalities for Weakly Relaxed Pseudomonotone SetValued Mappings in Banach Space
Wed, 07 Sep 2016 16:45:04 +0000
http://www.hindawi.com/journals/ijanal/2016/4760839/
We introduce and study variationallike inequalities for generalized pseudomonotone setvalued mappings in Banach spaces. By using KKM technique, we obtain the existence of solutions for variationallike inequalities for generalized pseudomonotone setvalued mappings in reflexive Banach spaces. The results presented in this paper are generalizations and improvements of the several wellknown results in the literature.
Syed Shakaib Irfan and Mohammad Firdosh Khan
Copyright © 2016 Syed Shakaib Irfan and Mohammad Firdosh Khan. All rights reserved.

Retracted: Quasilinear Inner Product Spaces and Hilbert Quasilinear Spaces
Sun, 21 Aug 2016 06:32:42 +0000
http://www.hindawi.com/journals/ijanal/2016/5731857/
International Journal of Analysis
Copyright © 2016 International Journal of Analysis. All rights reserved.

Some Congruence Properties of a Restricted Bipartition Function
Mon, 08 Aug 2016 07:54:11 +0000
http://www.hindawi.com/journals/ijanal/2016/9037692/
Let denote the number of bipartitions of a positive integer subject to the restriction that each part of is divisible by . In this paper, we prove some congruence properties of the function for , 11, and , for any integer , by employing Ramanujan’s thetafunction identities.
Nipen Saikia and Chayanika Boruah
Copyright © 2016 Nipen Saikia and Chayanika Boruah. All rights reserved.

On Inclusion Relations between Some Sequence Spaces
Wed, 03 Aug 2016 08:06:15 +0000
http://www.hindawi.com/journals/ijanal/2016/7283527/
We determine the relations between the classes of almost statistically convergent sequences and the relations between the classes of strongly almost summable sequences for various sequences , in the class . Furthermore we also give the relations between the classes of almost statistically convergent sequences and the classes of strongly almost summable sequences for various sequences .
R. Çolak, Ç. A. Bektaş, H. Altınok, and S. Ercan
Copyright © 2016 R. Çolak et al. All rights reserved.

Fixed Point Theorems for Geraghty Type Contractive Mappings and Coupled Fixed Point Results in 0Complete Ordered Partial Metric Spaces
Wed, 03 Aug 2016 07:47:41 +0000
http://www.hindawi.com/journals/ijanal/2016/8947020/
We establish new fixed point theorems in 0complete ordered partial metric spaces. Also, we give remark on coupled generalized Banach contraction. Some examples illustrate the usability of our results. The theorems presented in this paper are generalizations and improvements of the several well known results in the literature.
Esra Yolacan
Copyright © 2016 Esra Yolacan. All rights reserved.

On a Fixed Point Theorem with Application to Integral Equations
Mon, 30 May 2016 08:48:12 +0000
http://www.hindawi.com/journals/ijanal/2016/9843207/
We introduce the notion of dualistic Geraghty’s type contractions. We prove some fixed point theorems for ordered mappings satisfying the abovementioned contractions. We discuss an application of our fixed point results to show the existence of solution of integral equations.
Muhammad Nazam and Muhammad Arshad
Copyright © 2016 Muhammad Nazam and Muhammad Arshad. All rights reserved.

Singular Differential Equations and Drazin Invertible Operators
Tue, 15 Mar 2016 11:38:07 +0000
http://www.hindawi.com/journals/ijanal/2016/7975107/
We extend results of Favini, Nashed, and Zhao on singular differential equations using the Drazin inverse and the order of a quasinilpotent operator in the sense of Miekka and Nevanlinna. Two classes of singularly perturbed differential equations are studied using the continuity properties of the Drazin inverse obtained by Koliha and Rakočević.
Alrazi Abdeljabbar and Trung Dinh Tran
Copyright © 2016 Alrazi Abdeljabbar and Trung Dinh Tran. All rights reserved.

Cyclicity of Special Operators on a BK with AK Space
Mon, 21 Dec 2015 11:59:14 +0000
http://www.hindawi.com/journals/ijanal/2015/301983/
Let be a complex domain and let be a reflexive BK space with AK such that and the functional of evaluation at is bounded for all . We will investigate the cyclicity for the adjoint of a weighted composition operator acting on .
Leila Bagheri and Bahmann Yousefi
Copyright © 2015 Leila Bagheri and Bahmann Yousefi. All rights reserved.

A Survey on Operator Monotonicity, Operator Convexity, and Operator Means
Wed, 11 Nov 2015 09:13:36 +0000
http://www.hindawi.com/journals/ijanal/2015/649839/
This paper is an expository devoted to an important class of realvalued functions introduced by Löwner, namely, operator monotone functions. This concept is closely related to operator convex/concave functions. Various characterizations for such functions are given from the viewpoint of differential analysis in terms of matrix of divided differences. From the viewpoint of operator inequalities, various characterizations and the relationship between operator monotonicity and operator convexity are given by Hansen and Pedersen. In the viewpoint of measure theory, operator monotone functions on the nonnegative reals admit meaningful integral representations with respect to Borel measures on the unit interval. Furthermore, KuboAndo theory asserts the correspondence between operator monotone functions and operator means.
Pattrawut Chansangiam
Copyright © 2015 Pattrawut Chansangiam. All rights reserved.

Some Ostrowski Type Inequalities for Harmonically Convex Functions in Second Sense
Mon, 26 Oct 2015 12:34:27 +0000
http://www.hindawi.com/journals/ijanal/2015/672675/
The authors introduce the concept of harmonically convex functions in second sense and establish some Ostrowski type inequalities of these classes of functions.
Imran Abbas Baloch and İmdat İşcan
Copyright © 2015 Imran Abbas Baloch and İmdat İşcan. All rights reserved.

On Equalities Involving Integrals of the Logarithm of the Riemann Function with Exponential Weight Which Are Equivalent to the Riemann Hypothesis
Sun, 18 Oct 2015 16:22:19 +0000
http://www.hindawi.com/journals/ijanal/2015/980728/
Integral equalities involving integrals of the logarithm of the Riemann function with exponential weight functions are introduced, and it is shown that an infinite number of them are equivalent to the Riemann hypothesis. Some of these equalities are tested numerically. The possible contribution of the Riemann function zeroes nonlying on the critical line is rigorously estimated and shown to be extremely small, in particular, smaller than nine milliards of decimals for the maximal possible weight function exp(). We also show how certain Fourier transforms of the logarithm of the Riemann zetafunction taken along the real (demi)axis are expressible via elementary functions plus logarithm of the gammafunction and definite integrals thereof, as well as certain sums over trivial and nontrivial Riemann function zeroes.
Sergey K. Sekatskii, Stefano Beltraminelli, and Danilo Merlini
Copyright © 2015 Sergey K. Sekatskii et al. All rights reserved.

On Simultaneous Approximation of Modified BaskakovDurrmeyer Operators
Sun, 18 Oct 2015 13:04:37 +0000
http://www.hindawi.com/journals/ijanal/2015/805395/
We discuss properties of modified BaskakovDurrmeyerStancu (BDS) operators with parameter . We compute the moments of these modified operators. Also, we establish pointwise convergence, Voronovskaja type asymptotic formula, and an error estimation in terms of second order modification of continuity of the function for the operators .
Prashantkumar G. Patel and Vishnu Narayan Mishra
Copyright © 2015 Prashantkumar G. Patel and Vishnu Narayan Mishra. All rights reserved.

Geometric Properties of a Class of Analytic Functions Defined by a Differential Inequality
Sun, 04 Oct 2015 17:06:01 +0000
http://www.hindawi.com/journals/ijanal/2015/185635/
Let be the class of analytic functions defined in the open unit disk and normalized by . For in , let , where and . In the present paper, we find conditions under which functions in the class are starlike of order , .
Manpreet Kaur, Sushma Gupta, and Sukhjit Singh
Copyright © 2015 Manpreet Kaur et al. All rights reserved.

An Integral Mean Value Theorem concerning Two Continuous Functions and Its Stability
Sun, 27 Sep 2015 13:17:24 +0000
http://www.hindawi.com/journals/ijanal/2015/894625/
The aim of this paper is to investigate an integral mean value theorem proposed by one of the references of this paper. Unfortunately, the proof contains a gap. First, we present a counterexample which shows that this theorem fails in this form. Then, we present two improved versions of this theorem. The stability of the mean point arising from the second result concludes this paper.
Monea Mihai
Copyright © 2015 Monea Mihai. All rights reserved.

Error Estimation of Functions by FourierLaguerre Polynomials Using MatrixEuler Operators
Tue, 01 Sep 2015 11:44:27 +0000
http://www.hindawi.com/journals/ijanal/2015/478345/
Various investigators have studied the degree of approximation of a function using different summability (Cesáro means of order : , Euler , and Nörlund ) means of its FourierLaguerre series at the point after replacing the continuity condition in Szegö theorem by much lighter conditions. The product summability methods are more powerful than the individual summability methods and thus give an approximation for wider class of functions than the individual methods. This has motivated us to investigate the error estimation of a function by transform of its FourierLaguerre series at frontier point , where is a general lower triangular regular matrix. A particular case, when is a Cesáro matrix of order 1, that is, , has also been discussed as a corollary of main result.
M. L. Mittal and Mradul Veer Singh
Copyright © 2015 M. L. Mittal and Mradul Veer Singh. All rights reserved.

The de la Vallée Poussin Mean and Polynomial Approximation for Exponential Weight
Mon, 23 Mar 2015 08:35:05 +0000
http://www.hindawi.com/journals/ijanal/2015/706930/
We study boundedness of the de la Vallée Poussin means for exponential weight on . Our main result is for every and every , where . As an application, we obtain for .
K. Itoh, R. Sakai, and N. Suzuki
Copyright © 2015 K. Itoh et al. All rights reserved.

A New Look at Worst Case Complexity: A Statistical Approach
Mon, 29 Dec 2014 07:29:17 +0000
http://www.hindawi.com/journals/ijanal/2014/840432/
We present a new and improved worst case complexity model for quick sort as , where the LHS gives the worst case time complexity, is the input size, is the frequency of sample elements, and is a function of both the input size and the parameter . The rest of the terms arising due to linear regression have usual meanings. We claim this to be an improvement over the conventional model; namely, , which stems from the worst case complexity for this algorithm.
Niraj Kumar Singh, Soubhik Chakraborty, and Dheeresh Kumar Mallick
Copyright © 2014 Niraj Kumar Singh et al. All rights reserved.