@Article{,
author="",
title="Bulletin of the Iranian Mathematical Society",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="-",
abstract="",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_693.html"
}
@Article{Wu2015,
author="Wu, N.
and Xuan, Z. ",
title="On the uniqueness theory of algebroid functions in some proper domain",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1315-1326",
abstract="We consider the uniqueness problem of algebroid functions on an angular domain. Several theorems are established to extend the uniqueness theory of meromorphic functions to algebroid functions.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_694.html"
}
@Article{VamsheeKrishna2015,
author="Vamshee Krishna, D.
and Ramreddy, T.",
title="An upper bound to the second Hankel functional for the class of gamma-starlike functions",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1327-1337",
abstract="The objective of this paper is to obtain an upper bound to the second Hankel determinant $|a_{2}a_{4}-a_{3}^{2}|$ for the function $f$, belonging to the class of Gamma-starlike functions, using Toeplitz determinants. The result presented here include two known results as their special cases.
",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_695.html"
}
@Article{Krzywkowski2015,
author="Krzywkowski, M.",
title="On trees attaining an upper bound on the total domination number",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1339-1344",
abstract="A total dominating set of a graph $G$ is a set $D$ of vertices of $G$ such that every vertex of $G$ has a neighbor in $D$. The total domination number of a graph $G$, denoted by $\gamma_t(G)$, is~the minimum cardinality of a total dominating set of $G$. Chellali and Haynes [Total and paired-domination numbers of a tree, AKCE International ournal of Graphs and Combinatorics 1 (2004), 69--75] established the following upper bound on the total domination number of a tree in terms of the order and the number of support vertices, $\gamma_t(T) \le (n+s)/2$. We characterize all trees attaining this upper bound.
",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_696.html"
}
@Article{Blaga2015,
author="Blaga, A. M.
and Crasmareanu, M.",
title="Special connections in almost paracontact metric geometry",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1345-1353",
abstract="Two types of properties for linear connections (natural and almost paracontact metric) are discussed in almost paracontact metric geometry with respect to four linear connections: Levi-Civita, canonical (Zamkovoy), Golab and generalized dual. Their relationship is also analyzed with a special view towards their curvature. The particular case of an almost paracosymplectic manifold gives a major simplification in computations since the paracontact form is closed.
",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_697.html"
}
@Article{TakilMutlu2015,
author="Takil Mutlu, F.",
title="On Ads-modules with the SIP",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1355-1363",
abstract=" The class of ads modules with the SIP (briefly, $SA$-modules) is studied. Various conditions for a module to be $SA$-module are given. It is proved that for a quasi-continuous module $M$, $M$ is a UC-module if and only if $M$ is an $SA$-module. Also, it is proved that the direct sum of two $SA$-modules as $R$-modules is an $SA$-module when $R$ is the sum of the annihilators of these modules.
",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_698.html"
}
@Article{Chen2015,
author="Chen, H.
and Kose, H.
and Kurtulmaz, Y.",
title="Strongly clean triangular matrix rings with endomorphisms",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1365-1374",
abstract="A ring $R$ is strongly clean provided that every element in $R$ is the sum of an idempotent and a unit that commutate. Let $T_n(R,\sigma)$ be the skew triangular matrix ring over a local ring $R$ where $\sigma$ is an endomorphism of $R$. We show that $T_2(R,\sigma)$ is strongly clean if and only if for any $a\in 1+J(R), b\in J(R)$, $l_a-r_{\sigma(b)}: R\to R$ is surjective. Further, $T_3(R,\sigma)$ is strongly clean if $l_{a}-r_{\sigma(b)}, l_{a}-r_{\sigma^2(b)}$ and $l_{b}-r_{\sigma(a)}$ are surjective for any $a\in U(R),b\in J(R)$. The necessary condition for $T_3(R,\sigma)$ to be strongly clean is also obtained. ",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_699.html"
}
@Article{Asgari2015,
author="Asgari, M. S.
and Badehian, Z.",
title="Fixed point theorems for $\alpha$-$\psi$-contractive mappings in partially ordered sets and application to ordinary differential equations",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1375-1386",
abstract="In this paper, we introduce $\alpha$-$\psi$-contractive mapping in partially ordered sets and construct fixed point theorems to solve a first-order ordinary differential equation by existence of its lower solution.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_700.html"
}
@Article{Wang2015,
author="Wang, F.
and Sun, S.",
title="Existence and multiplicity of positive solutions for singular Monge-Amp$\rm\grave{e}$re system",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1387-1399",
abstract="Using the fixed point theorem in a cone, the existence and multiplicity of radial convex solutions of singular system of Monge-Amp\`{e}re equations are established.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_701.html"
}
@Article{Li2015,
author="Li, X.
and Xiong, L. ",
title="Some properties for a class of meromorphically multivalent functions with linear operator",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1401-1412",
abstract="Making use of a linear operator, which is defined here by means of the Hadamard product (or convolution), we define a subclass $\mathcal {T}_{p}(a, c, \gamma, \lambda; h)$ of meromorphically multivalent functions. The main object of this paper is to investigate some important properties for the class. We also derive many results for the Hadamard roducts of functions belonging to the class.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_702.html"
}
@Article{Ahmad2015,
author="Ahmad, R.
and Akram, M.",
title="Some existence results for generalized vector quasi-equilibrium problems",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1413-1422",
abstract="In this paper, we introduce and study a class of generalized vector quasi-equilibrium problem, which includes many vector equilibrium problems, equilibrium problems, vector variational inequalities and variational inequalities as special cases. Using one person game theorems, the concept of escaping sequences and without convexity assumptions, we prove some existence results for generalized vector quasi-equilibrium problem.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_703.html"
}
@Article{JafarianAmri2015,
author="Jafarian Amri, S. M.
and Amiri, M.
and Madadi, H.
and Rostami, H.",
title="Finite groups have even more centralizers",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1423-1431",
abstract="For a finite group $G$, let $Cent(G)$ denote the set of centralizers of single elements of $G$. In this note we prove that if $|G|\leq \frac{3}{2}|Cent(G)|$ and $G$ is 2-nilpotent, then $G\cong S_3, D_{10}$ or $S_3\times S_3$. This result gives a partial and positive answer to a conjecture raised by A. R. Ashrafi [On finite groups with a given number of centralizers, Algebra Colloq. 7 (2000), no. 2, 139--146].",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_704.html"
}
@Article{Rezapour2015,
author="Rezapour, Sh.
and Salehi, S.",
title="On the existence of solution for a $k$-dimensional system of three points nabla fractional finite difference equations",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1433-1444",
abstract="In this paper, we investigate the existence of solution for a k-dimensional system of three points nabla fractional finite difference equations. Also, we present an example to illustrate our result.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_705.html"
}
@Article{Peng2015,
author="Peng, L. X.
and Yang, C.",
title="A note on Volterra and Baire spaces",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1445-1452",
abstract=" In Proposition 2.6 in (G. Gruenhage, A. Lutzer, Baire and Volterra spaces, \textit{Proc. Amer. Math. Soc.} {128} (2000), no. 10, 3115--3124) a condition that every point of $D$ is $G_\delta$ in $X$ was overlooked. So we proved some conditions by which a Baire space is equivalent to a Volterra space. In this note we show that if $X$ is a monotonically normal $T_1$-space with countable pseudocharacter and $X$ has a $\sigma$-discrete dense subspace $D$, then $X$ is a Baire space if and only if $X$ is Volterra. We show that if $X$ is a metacompact normal sequential $T_1$-space and $X$ has a $\sigma$-closed discrete dense subset, then $X$ is a Baire space if and only if $X$ is Volterra. If $X$ is a generalized ordered (GO) space and has a $\sigma$-closed discrete dense subset, then $X$ is a Baire space if and only if $X$ is Volterra. And also some known results are generalized.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_706.html"
}
@Article{Zakeri2015,
author="Zakeri, A.
and Jannati, Q.
and Amiri, A.",
title="A numerical scheme for solving nonlinear backward parabolic problems",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1453-1464",
abstract="In this paper a nonlinear backward parabolic problem in one dimensional space is considered. Using a suitable iterative algorithm, the problem is converted to a linear backward parabolic problem. For the corresponding problem, the backward finite differences method with suitable grid size is applied. It is shown that if the coefficients satisfy some special conditions, this algorithm not only is convergent, but also is conditionally stable. Moreover, it is proved that the estimated values converge to the exact solution of the problem. Al these approaches examined in some numerical examples. corresponding theorems for the convergency and stability of the solution are studied.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_707.html"
}
@Article{Ali2015,
author="Ali, S.
and Dar, N. A.",
title="On centralizers of prime rings with involution",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1465-1475",
abstract="Let $R$ be a ring with involution $*$. An additive mapping $T:R\to R$ is called a left(respectively right) centralizer if $T(xy)=T(x)y$ (respectively $T(xy)=xT(y)$) for all $x,y\in R$. The purpose of this paper is to examine the commutativity of prime rings with involution satisfying certain identities involving left centralizers.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_708.html"
}
@Article{Saiedinezhad2015,
author="Saiedinezhad, S.
and Ghaemi, M. B.",
title="The fibering map approach to a quasilinear degenerate p(x)-Laplacian equation",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1477-1492",
abstract="By considering a degenerate $p(x)-$Laplacian equation, a generalized compact embedding in weighted variable exponent Sobolev space is presented. Multiplicity of positive solutions are discussed by applying fibering map approach for the corresponding Nehari manifold. ",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_709.html"
}
@Article{Mousavi2015,
author="Mousavi, H.",
title="Groups with one conjugacy class of non-normal subgroups - a short proof",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1493-1495",
abstract="For a finite group $G$ let $nu(G)$ denote the number of conjugacy classes of non-normal subgroups of $G$. We give a short proof of a theorem of Brandl, which classifies finite groups with $nu(G)=1$.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_710.html"
}
@Article{GhasemiHonary2015,
author="Ghasemi Honary, T.
and Omidi, M.
and Sanatpour, A. H.",
title="Automatic continuity of almost multiplicative maps between Frechet algebras",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1497-1509",
abstract="For Fr$acute{mathbf{text{e}}}$chet algebras $(A, (p_n))$ and $(B, (q_n))$, a linear map $T:Arightarrow B$ is textit{almost multiplicative} with respect to $(p_n)$ and $(q_n)$, if there exists $varepsilongeq 0$ such that $q_n(Tab - Ta Tb)leq varepsilon p_n(a) p_n(b),$ for all $n in mathbb{N}$, $a, b in A$, and it is called textit{weakly almost multiplicative} with respect to $(p_n)$ and $(q_n)$, if there exists $varepsilongeq 0$ such that for every $k in mathbb{N}$, there exists $n(k) in mathbb{N}$, satisfying the inequality $q_k(Tab - Ta Tb)leq varepsilon p_{n(k)}(a) p_{n(k)}(b),$ for all $a, b in A$. We investigate the automatic continuity of (weakly) almost multiplicative maps between certain classes of Fr$acute{mathbf{text{e}}}$chet algebras, such as Banach algebras and Fr$acute{mathbf{text{e}}}$chet $Q$-algebras. We also obtain some results on the automatic continuity of dense range (weakly) almost multiplicative maps between Fr$acute{mathbf{text{e}}}$chet algebras.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_711.html"
}
@Article{Bao2015,
author="Bao, G.
and Yang, J.",
title="The Libera operator on Dirichlet spaces",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1511-1517",
abstract="In this paper, we consider the boundedness of the Libera operator on Dirichlet spaces in terms of the Schur test. Moreover, we get its point spectrum and norm.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_712.html"
}
@Article{PanjehAliBeik2015,
author="Panjeh Ali Beik, F.
and Nasseri Shams, N.",
title="On the modified iterative methods for $M$-matrix linear systems",
journal="Bulletin of the Iranian Mathematical Society",
year="2015",
volume="41",
number="6",
pages="1519-1535",
abstract="This paper deals with scrutinizing the convergence properties of iterative methods to solve linear system of equations. Recently, several types of the preconditioners have been applied for ameliorating the rate of convergence of the Accelerated Overrelaxation (AOR) method. In this paper, we study the applicability of a general class of the preconditioned iterative methods under certain conditions. More precisely, it is demonstrated that the preconditioned Mixed-Type Splitting (MTS) iterative methods can surpass the preconditioned AOR iterative methods for an entirely general class of preconditioners handled by Wang and Song [J. Comput. Appl. Math. 226 (2009), no. 1, 114--124]. Finally some numerical results are elaborated which confirm the validity of the established results.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_713.html"
}