**Volume 09 (2020)**

**Volume 08 (2019)**

**Volume 07 (2018)**

**Volume 06 (2017)**

**Volume 05 (2016)**

**Volume 04 (2015)**

**Volume 03 (2014)**

**Volume 02 (2013)**

**Volume 01 (2012)**

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Number of Articles: 220

##### 51. Integral type contraction and coupled fixed point theorems in ordered G-metric spaces

*Volume 09, Issue 02 , Spring 2020, , Pages 113-120*

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**Abstract **

In this paper, we apply the idea of integral type contraction and prove some coupled fixed point theorems for such contractions in ordered $G$-metric space. Also, we support the main results by an illustrative example.
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##### 52. On Laplacian energy of non-commuting graphs of finite groups

*Volume 07, Issue 02 , Spring 2018, , Pages 121-132*

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**Abstract **

Let $G$ be a finite non-abelian group with center $Z(G)$. The non-commuting graph of $G$ is a simple undirected graph whose vertex set is $G\setminus Z(G)$ and two vertices $x$ and $y$ are adjacent if and only if $xy \ne yx$. In this paper, we compute Laplacian energy of ...
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##### 53. Tripled coincidence point under ϕ-contractions in ordered $G_b$-metric spaces

*Volume 03, Issue 03 , Summer 2014, , Pages 131-147*

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**Abstract **

In this paper, tripled coincidence points of mappings satisfying $\psi$-contractive conditions in the framework of partially ordered $G_b$-metric spaces are obtained. Our results extend the results of Aydi et al. [H. Aydi, E. Karapinar and W. Shatanawi, Tripled fixed point results ...
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##### 54. Some results of semilocally simply connected property

*Volume 02, Issue 03 , Summer 2013, , Pages 137-143*

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**Abstract **

If we consider some special conditions, we can assume fundamental group of a topological space as a new topological space. In this paper, we will present a number of theorems in topological fundamental group related to semilocally simply connected property for a topological space.
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##### 55. The directional hybrid measure of efficiency in data envelopment analysis

*Volume 05, Issue 03 , Summer 2016, , Pages 155-174*

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**Abstract **

The efficiency measurement is a subject of great interest. The majority of studies on DEA models have been carried out using radial or non-radial approaches regarding the application of DEA for the efficiency measurement. This paper, based on the directional distance function, proposes a new generalized ...
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##### 56. Invariant elements in the dual Steenrod algebra

*Volume 08, Issue 03 , Summer 2019, , Pages 167-172*

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**Abstract **

In this paper, we investigate the invariant elements of the dual mod $p$ Steenrod subalgebra ${\mathcal{A}_p}^*$ under the conjugation map $\chi$ and give bounds on the dimensions of $(\chi-1)({\mathcal{A}_p}^*)_d$, where $({\mathcal{A}_p}^*)_d$ is the dimension of ${\mathcal{A}_p}^*$ ...
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##### 57. Some local fixed point results under $C$-class functions with applications to coupled elliptic systems

*Volume 07, Issue 03 , Summer 2018, , Pages 169-182*

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**Abstract **

The main objective of the paper is to state newly fixed point theorems for set-valued mappings in the framework of 0-complete partial metric spaces which speak about a location of a fixed point with respect to an initial value of the set-valued mapping by using some $C$-class functions. The results proved ...
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##### 58. Application of triangular functions for solving the vasicek model

*Volume 04, Issue 03 , Summer 2015, , Pages 173-182*

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**Abstract **

This paper introduces a numerical method for solving the vasicek model by using a stochastic operational matrix based on the triangular functions (TFs) in combination with the collocation method. The method is stated by using conversion the vasicek model to a stochastic nonlinear system of $2m+2$ equations ...
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##### 59. Soft regular generalized b-closed sets in soft topological spaces

*Volume 03, Issue 04 , Autumn 2014, , Pages 196-204*

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**Abstract **

The main purpose of this paper is to introduce and study new classes of soft closed sets like soft regular generalized b-closed sets in soft topological spaces (briefly soft rgb-closed set) Moreover, soft rg-closed, soft gpr-closed, soft gb-closed, soft gsp-closed, soft g$\alpha$-closed, ...
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##### 60. Fuzzy almost generalized $e$-continuous mappings

*Volume 06, Issue 03 , Summer 2017, , Pages 199-206*

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**Abstract **

In this paper, we introduce and characterize the concept of fuzzy almost generalized $e$-continuous mappings. Several interesting properties of these mappings are also given. Examples and counter examples are also given to illustrate the concepts introduced in the paper. We also introduce the concept ...
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##### 61. Operator-valued bases on Hilbert spaces

*Volume 02, Issue 04 , Autumn 2013, , Pages 201-218*

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**Abstract **

In this paper we develop a natural generalization of Schauder basis theory, we term operator-valued basis or simply ov-basis theory, using operator-algebraic methods. We prove several results for ov-basis concerning duality, orthogonality, biorthogonality and minimality. We prove that ...
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##### 62. Hyers–Ulam–Rassias stability of impulsive Volterra integral equation via a fixed point approach

*Volume 08, Issue 04 , Autumn 2019, , Pages 219-227*

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**Abstract **

In this paper, we establish the Hyers--Ulam--Rassias stability and the Hyers--Ulam stability of impulsive Volterra integral equation by using a fixed point method.
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##### 63. On quasi-baer modules

*Volume 05, Issue 04 , Autumn 2016, , Pages 235-240*

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**Abstract **

Let $R$ be a ring, $\sigma$ be an endomorphism of $R$ and $M_R$ be a $\sigma$-rigid module. A module $M_R$ is called quasi-Baer if the right annihilator of a principal submodule of $R$ is generated by an idempotent. It is shown that an $R$-module $M_R$ is a quasi-Baer module if and only ...
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##### 64. Linear \v{C}ech closure spaces

*Volume 07, Issue 04 , Autumn 2018, , Pages 261-268*

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**Abstract **

In this paper, we introduce the concept of linear \v{C}ech closure spaces and establish the properties of open sets in linear \v{C}ech closure spaces (L\v{C}CS). Here, we observe that the concept of linearity is preserved by semi-open sets, g-semi open sets, $\gamma$-open sets, sgc-dense sets and compact ...
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##### 65. A fixed point method for proving the stability of ring $(\alpha, \beta, \gamma)$-derivations in $2$-Banach algebras

*Volume 06, Issue 04 , Autumn 2017, , Pages 269-276*

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**Abstract **

In this paper, we first present the new concept of $2$-normed algebra. We investigate the structure of this algebra and give some examples. Then we apply a fixed point theorem to prove the stability and hyperstability of $(\alpha, \beta, \gamma)$-derivations in $2$-Banach algebras.
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##### 66. On the superstability of a special derivation

*Volume 03, Issue 01 , Winter 2014, , Pages 15-22*

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**Abstract **

The aim of this paper is to show that under some mild conditions a functional equation of multiplicative $(\alpha,\beta)$-derivation is superstable on standard operator algebras. Furthermore, we prove that this generalized derivation can be a continuous and an inner $(\alpha,\beta)$-derivation.
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##### 67. A note on power values of generalized derivation in prime ring and noncommutative Banach algebras

*Volume 01, Issue 01 , Winter 2012, , Pages 15-20*

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**Abstract **

Let $R$ be a prime ring with extended centroid $C$, $H$ a generalized derivation of $R$ and $n\geq 1$ a fixed integer. In this paper we study the situations: (1) If $(H(xy))^n =(H(x))^n(H(y))^n$ for all $x,y\in R$; (2) obtain some related result in case $R$ is a noncommutative Banach algebra ...
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##### 68. Transformations computations: Power, Roots and Inverse

*Volume 07, Issue 01 , Winter 2018, , Pages 21-38*

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**Abstract **

This paper presents some results of an annihilated element in Banach algebra, and in specific case, for any square matrix. The developed method significantly improves the computational aspects of transformations calculus and especially for finding powers and roots of any ...
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##### 69. Frames for compressed sensing using coherence

*Volume 04, Issue 01 , Winter 2015, , Pages 25-34*

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**Abstract **

We give some new results on sparse signal recovery in the presence of noise, for weighted spaces. Traditionally, were used dictionaries that have the norm equal to 1, but, for random dictionaries this condition is rarely satised. Moreover, we give better estimations then the ones given ...
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##### 70. G-Frames, g-orthonormal bases and g-Riesz bases

*Volume 02, Issue 01 , Winter 2013, , Pages 25-33*

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**Abstract **

G-Frames in Hilbert spaces are a redundant set of operators which yield a representation for each vector in the space. In this paper we investigate the connection between g-frames, g-orthonormal bases and g-Riesz bases. We show that a family of bounded operators is a g-Bessel sequences if and only ...
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##### 71. On some forms of e*-irresoluteness

*Volume 08, Issue 01 , Winter 2019, , Pages 25-39*

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**Abstract **

The main goal of this paper is to introduce and study two new class of functions, called weakly $e^*$-irresolute functions and strongly $e^*$-irresolute functions, via the notion of $e^*$-open set defined by Ekici [7]. We obtain several fundamental properties and characterizations ...
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##### 72. Common fixed point results on vector metric spaces

*Volume 05, Issue 01 , Winter 2016, , Pages 29-39*

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**Abstract **

In this paper we consider the so called a vector metric space, which is a generalization of metric space, where the metric is Riesz space valued. We prove some common fixed point theorems for three mappings in this space. Obtained results extend and generalize well-known comparable results in the literature.
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##### 73. Unique common coupled fixed point theorem for four maps in $S_b$-metric spaces

*Volume 06, Issue 01 , Winter 2017, , Pages 29-43*

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**Abstract **

In this paper we prove a unique common coupled fixed point theorem for two pairs of $w$-compatible mappings in $S_b$-metric spaces satisfying a contrctive type condition. We furnish an example to support our main theorem. We also give a corollary for Junck type maps.
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##### 74. 2-Banach stability results for the radical cubic functional equation related to quadratic mapping

*Volume 09, Issue 01 , Winter 2020, , Pages 35-51*

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**Abstract **

The aim of this paper is to introduce and solve the generalized radical cubic functional equation related to quadratic functional equation$$f\left(\sqrt[3]{ax^{3}+by^{3}}\right)+f\left(\sqrt[3]{ax^{3}-by^{3}}\right)=2a^{2}f(x)+2b^{2}f(y),\;\; x,y\in\mathbb{R},$$for a mapping $f$ from $\mathbb{R}$ ...
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##### 75. A mathematically simple method based on denition for computing eigenvalues, generalized eigenvalues and quadratic eigenvalues of matrices

*Volume 01, Issue 02 , Spring 2012, , Pages 71-81*