Sahand Communications in Mathematical Analysis

ارسال های اخیر

  • On Some Coupled Fixed Point Theorems with Rational Expressions in Partially Ordered Metric Spaces 

    Seshagiri Rao, N.؛ Seshagiri Rao, N.؛ Kalyani, K.؛ Kalyani, K. (University of Maragheh, 2021-02-01)
    The aim of this paper is to prove some coupled fixed point  theorems of  a self mapping satisfying a certain rational type contraction along with  strict mixed monotone property in an ordered metric space. Further, a result  ...

  • A Fixed Point Theorem for Weakly Contractive Mappings 

    Saheli, Morteza؛ Saheli, Morteza؛ Mohsenialhosseini, Seyed Ali Mohammad؛ Mohsenialhosseini, Seyed Ali Mohammad (University of Maragheh, 2021-02-01)
    In this paper, we generalize the concepts of weakly Kannan, weakly Chatterjea and weakly Zamfirescu for fuzzy metric spaces. Also, we investigate Banach's fixed point theorem for the mentioned classes of functions in these ...

  • Some bi-Hamiltonian Systems and their Separation of Variables on 4-dimensional Real Lie Groups 

    Haghighatdoost, Ghorbanali؛ Haghighatdoost, Ghorbanali؛ Abdolhadi-Zangakani, Salahaddin؛ Abdolhadi-Zangakani, Salahaddin؛ Mahjoubi-Bahman, Rasoul؛ Mahjoubi-Bahman, Rasoul (University of Maragheh, 2021-02-01)
    In this work, we discuss bi-Hamiltonian structures on a family of integrable systems on 4-dimensional real Lie groups. By constructing the corresponding control matrix  for this family of bi-Hamiltonian structures, we ...

  • On New Extensions of Hermite-Hadamard Inequalities for Generalized Fractional Integrals 

    Budak, Huseyin؛ Budak, Huseyin؛ Pehlivan, Ebru؛ Pehlivan, Ebru؛ Kosem, Pınar؛ Kosem, Pınar (University of Maragheh, 2021-02-01)
    In this paper, we establish some Trapezoid and Midpoint type inequalities for generalized fractional integrals by utilizing the functions whose second derivatives are bounded . We also give some new inequalities for ...

  • $K$-orthonormal and $K$-Riesz Bases 

    Ahmdi, Ahmad؛ Ahmdi, Ahmad؛ Rahimi, Asghar؛ Rahimi, Asghar (University of Maragheh, 2021-02-01)
    Let $K$ be a bounded operator. $K$-frames are ordinary frames for the range $K$. These frames are a generalization of ordinary frames and are certainly different from these frames. This research introduces a new concept ...

  • Gabor Dual Frames with Characteristic Function Window 

    Hasankhani Fard, Mohammad Ali؛ Hasankhani Fard, Mohammad Ali (University of Maragheh, 2021-02-01)
    The duals of Gabor frames have an essential role in reconstruction of signals. In this paper we find a necessary and sufficient  condition for two Gabor systems $left(chi_{left[c_1,d_1right)},a,bright)$ and $left(chi_{le ...

  • On the Stability of Mixed Additive--Quadratic and Additive--Drygas Functional Equations 

    Najati, Abbas؛ Najati, Abbas؛ Noori, Batool؛ Noori, Batool؛ Moghimi, Mohammad Bagher؛ Moghimi, Mohammad Bagher (University of Maragheh, 2021-02-01)
    In this paper,  we have improved some of the results in [C. Choi and   B. Lee, Stability of Mixed Additive-Quadratic and Additive--Drygas Functional Equations. Results Math.  75  no. 1 (2020), Paper No. 38]. Indeed, we ...

  • A Note on Some Results for $C$-controlled $K$-Fusion Frames in Hilbert Spaces 

    Shakoory, Habib؛ Shakoory, Habib؛ Ahmadi, Reza؛ Ahmadi, Reza؛ Behzadi, Naghi؛ Behzadi, Naghi؛ Nami, Susan؛ Nami, Susan (University of Maragheh, 2021-02-01)
    In this manuscript, we study the relation between K-fusion frame and its local components which leads to the definition of a $C$-controlled $K$-fusion frames, also we extend a theory based on K-fusion frames on Hilbert ...

  • Some Properties of Lebesgue Fuzzy Metric Spaces 

    Adhya, Sugata؛ Adhya, Sugata؛ Deb Ray, Atasi؛ Deb Ray, Atasi (University of Maragheh, 2021-02-01)
    In this paper, we establish a sequential characterisation of Lebesgue fuzzy metric and explore the relationship between Lebesgue, weak $G$-complete and compact fuzzy metric spaces. We also discuss the Lebesgue property of ...

  • Fixed Point Results for Extensions of Orthogonal Contraction on Orthogonal Cone Metric Space 

    Bilgili Gungor, Nurcan؛ Turkoglu, Duran (University of Maragheh, 2020-11-01)
    In this paper, some fixed point results of self mapping which is defined on orthogonal cone metric spaces are given by using extensions of orthogonal contractions. And by taking advantage of these results, the necessary ...

  • On the Basicity of Systems of Sines and Cosines with a Linear Phase in Morrey-Type Spaces 

    Seyidova, Fidan (University of Maragheh, 2020-11-01)
    In this work systems of sines $sin left(n+beta right)t,, , n=1,2, ldots,$ and cosines $cos left(n-beta right)t,, , n=0,1,2, ldots,$ are considered, where $beta in R-$is a real parameter. The subspace $M^{p,alpha } left(0,pi ...

  • Some Properties of Certain Subclass of Meromorphic Functions Associated with $(p , q)$-derivative 

    Golmohammadi, Mohammad Hassan؛ Najafzadeh, Shahram؛ Foroutan, Mohammad Reza (University of Maragheh, 2020-11-01)
    In this paper, by making use of $(p , q) $-derivative operator we introduce a new subclass of meromorphically univalent functions. Precisely, we give a necessary and sufficient coefficient condition for functions in this ...

  • Integral Operators on the Besov Spaces and Subclasses of Univalent Functions 

    Orouji, Zahra؛ Ebadian, Ali (University of Maragheh, 2020-11-01)
    ‎In this note, we study the integral operators $I_{g}^{gamma, alpha}$ and $J_{g}^{gamma, alpha}$ of an analytic function $g$ on convex and starlike functions of a complex order. Then, we investigate the same operators on ...

  • Using Copulas to Model Dependence Between Crude Oil Prices of West Texas Intermediate and Brent-Europe 

    Najjari, Vadoud (University of Maragheh, 2020-11-01)
    In this study the main endeavor is to model dependence structure  between crude oil prices of West Texas Intermediate (WTI) and Brent - Europe.  The main activity is on concentrating copula technique which is powerful ...

  • First and Second Module Cohomology Groups for Non Commutative Semigroup Algebras 

    Nasrabadi, Ebrahim (University of Maragheh, 2020-11-01)
    ‎Let $S$ be a (not necessarily commutative) Clifford semigroup with idempotent set $E$. In this paper, we show that the first (second) Hochschild cohomology group and the first (second) module cohomology group of  semigroup ...

  • On Measure Chaotic Dynamical Systems 

    Ghorbani Moghaddam, Faride؛ Zamani Bahabadi, Alireza؛ Honary, Bahman (University of Maragheh, 2020-11-01)
    In this paper, we introduce chaotic measure for discrete and continuous dynamical systems and study some properties of measure chaotic systems. Also relationship between chaotic measure, ergodic and expansive measures is ...

  • On Certain Generalized Bazilevic type Functions Associated with Conic Regions 

    Noor, Khalida Inayat؛ Shah, Shujaat Ali (University of Maragheh, 2020-11-01)
    Let $f$ and $g$ be analytic in the open unit disc and, for $alpha ,$ $beta geq 0$, letbegin{align*}Jleft( alpha ,beta ,f,gright) & =frac{zf^{prime }(z)}{f^{1-alpha}(z)g^{alpha }(z)}+beta left( 1+frac{zf^{prime prime ...

  • Non-Equivalent Norms on $C^b(K)$ 

    Khoddami, Ali Reza (University of Maragheh, 2020-11-01)
    ‎Let $A$ be a non-zero normed vector space and let $K=overline{B_1^{(0)}}$ be the closed unit ball of $A$. Also, let $varphi$ be a non-zero element of $ A^*$ such that $Vert varphi Vertleq 1$. We first define a new norm ...

  • $n$-factorization Property of Bilinear Mappings 

    Barootkoob, Sedigheh (University of Maragheh, 2020-07-01)
    In this paper, we define a new concept of factorization for a bounded bilinear mapping $f:Xtimes Yto Z$, depended on  a natural number $n$ and a cardinal number $kappa$; which is called $n$-factorization property of level ...

  • Joint and Generalized Spectral Radius of Upper Triangular Matrices with Entries in a Unital Banach Algebra 

    Mohammadzadehkan, Hamideh؛ Ebadian, Ali؛ Haghnejad Azar, Kazem (University of Maragheh, 2020-07-01)
    In this paper, we discuss some properties of joint spectral {radius(jsr)} and  generalized spectral radius(gsr)  for a finite set of upper triangular matrices with entries in a Banach algebra and represent relation between ...

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