Volume 43, Issue 2
مرور بر اساس
ارسال های اخیر
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Comparative study on solving fractional differential equations via shifted Jacobi collocation method
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this paper, operational matrices of Riemann-Liouville fractional integration and Caputo fractional differentiation for shifted Jacobi polynomials are considered. Using the given initial conditions, we transform the ...
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Pullback D-attractors for non-autonomous partly dissipative reaction-diffusion equations in unbounded domains
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)At present paper, we establish the existence of pullback $mathcal{D}$-attractor for the process associated with non-autonomous partly dissipative reaction-diffusion equation in $L^2(mathbb{R}^n)times L^2(mathbb{R}^n)$. In ...
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Separating partial normality classes with weighted composition operators
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this article, we discuss measure theoretic characterizations for weighted composition operators in some operator classes on $L^{2}(Sigma)$ such as, $n$-power normal, $n$-power quasi-normal, $k$-quasi-paranormal and ...
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On convergence of sample and population Hilbertian functional principal components
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this article we consider the sequences of sample and population covariance operators for a sequence of arrays of Hilbertian random elements. Then under the assumptions that sequences of the covariance operators norm are ...
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Left derivable or Jordan left derivable mappings on Banach algebras
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)Let $mathcal{A}$ be a unital Banach algebra, $mathcal{M}$ be a left $mathcal{A}$-module, and $W$ in $mathcal{Z}(mathcal{A})$ be a left separating point of $mathcal{M}$. We show that if $mathcal{M}$ is a unital left ...
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Module homomorphisms from Frechet algebras
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)We first study some properties of $A$-module homomorphisms $theta:Xrightarrow Y$, where $X$ and $Y$ are Fréchet $A$-modules and $A$ is a unital Fréchet algebra. Then we show that if there exists a continued ...
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A characterization of simple $K_4$-groups of type $L_2(q)$ and their automorphism groups
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this paper, it is proved that all simple $K_4$-groups of type $L_2(q)$ can be characterized by their maximum element orders together with their orders. Furthermore, the automorphism groups of simple $K_4$-groups of type ...
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The Steiner diameter of a graph
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)The Steiner distance of a graph, introduced by Chartrand, Oellermann, Tian and Zou in 1989, is a natural generalization of the concept of classical graph distance. For a connected graph $G$ of order at least ...
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Digital Borsuk-Ulam theorem
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)The aim of this paper is to compute a simplicial cohomology group of some specific digital images. Then we define ringand algebra structures of a digital cohomology with the cup product. Finally, we prove a special case ...
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Strong convergence theorem for solving split equality fixed point problem which does not involve the prior knowledge of operator norms
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)Our contribution in this paper is to propose an iterative algorithm which does not require prior knowledge of operator norm and prove a strong convergence theorem for approximating a solution of split equality fixed point ...
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Extrinsic sphere and totally umbilical submanifolds in Finsler spaces
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)Based on a definition for circle in Finsler space, recently proposed by one of the present authors and Z. Shen, a natural definition of extrinsic sphere in Finsler geometry is given and it is shown that a connected ...
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A new result on chromaticity of K4-homoemorphs with girth 9
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)For a graph $G$, let $P(G,lambda)$ denote the chromatic polynomial of $G$. Two graphs $G$ and $H$ are chromatically equivalent if they share the same chromatic polynomial. A graph $G$ is chromatically unique if any graph ...
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Triple positive solutions of $m$-point boundary value problem on time scales with $p$-Laplacian
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this paper, we consider the multipoint boundary value problem for one-dimensional $p$-Laplacian dynamic equation on time scales. We prove the existence at least three positive solutions of the boundary value ...
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New classes of Lyapunov type inequalities of fractional $Delta$-difference Sturm-Liouville problems with applications
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this paper, we consider a new study about fractional $Delta$-difference equations. We consider two special classes of Sturm-Liouville problems equipped with fractional $Delta$-difference operators. In couple of ...
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Some extended Simpson-type inequalities and applications
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this paper, we shall establish some extended Simpson-type inequalities for differentiable convex functions and differentiable concave functions which are connected with Hermite-Hadamard inequality. Some error ...
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Multipliers of continuous $G$-frames in Hilbert spaces
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this paper we introduce continuous $g$-Bessel multipliers in Hilbert spaces and investigate some of their properties. We provide some conditions under which a continuous $g$-Bessel multiplier is a compact operator. Also, ...
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Connections between labellings of trees
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)There are many long-standing conjectures related with some labellings of trees. It is important to connect labellings that are related with conjectures. We find some connections between known labellings of simple graphs.
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Bulletin of the Iranian Mathematical Society
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)
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Study on multi-order fractional differential equations via operational matrix of hybrid basis functions
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)In this paper we apply hybrid functions of general block-pulse functions and Legendre polynomials for solving linear and nonlinear multi-order fractional differential equations (FDEs). Our approach is based on ...
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Flag-transitive point-primitive $(v,k,4)$ symmetric designs with exceptional socle of Lie type
(Springer and the Iranian Mathematical Society (IMS), 2017-04-01)Let $G$ be an automorphism group of a $2$-$(v,k,4)$ symmetric design $mathcal D$. In this paper, we prove that if $G$ is flag-transitive point-primitive, then the socle of $G$ cannot be an exceptional group of ...
