@Article{Babayar-Razlighi2012,
author="Babayar-Razlighi, B.
and Ivaz, Karim
and Mokhtarzadeh, M. R.
and Badamchizadeh, A. N.",
title="Newton-Product integration for a Two-phase Stefan problem with Kinetics",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="853-868",
abstract="We reduce the two phase Stefan problem with kinetic to a system of nonlinear Volterra integral equations of second kind and apply Newton's method to linearize it. We found product integration solution of the linear form. Sufficient conditions for convergence of the numerical method are given and their applicability is illustrated with an example.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_269.html"
}
@Article{Asadi-Golmankhaneh2012,
author="Asadi-Golmankhaneh, Mohammad Ali",
title="Multiple point of self-transverse immesions of certain manifolds",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="869-882",
abstract="In this paper we will determine the multiple point manifolds of certain self-transverse immersions in Euclidean spaces. Following the triple points, these immersions have a double point self-intersection set which is the image of an immersion of a smooth 5-dimensional manifold, cobordant to Dold manifold $V^5$ or a boundary. We will show there is an immersion of $S^7times P^2$ in $mathbb{R}^{13}$ with double point manifold cobordant to Dold manifold $V^5$, and an immersion of $P^2times P^2times P^2times P^2times P^2$ in $mathbb{R}^{15}$ with double point manifold a boundary and the triple point set is odd number. These will be done by introducing the product technique and reading off the Stiefel-Whitney numbers of the self-intersection manifolds.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_292.html"
}
@Article{Rahimi2012,
author="Rahimi, Mehdi
and Riazi, Abdolhamid",
title="Entropy operator for continuous dynamical systems of finite topological entropy",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="883-892",
abstract="In this paper we introduce the concept of entropy operator for continuous systems of finite topological entropy. It is shown that it generates the Kolmogorov entropy as a special case. If $phi$ is invertible then the entropy operator is bounded with the topological entropy of $phi$ as its norm.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_223.html"
}
@Article{Ashraf2012,
author="Ashraf, Mohammad
and Ali, Shakir
and Rehman, Nadeem ur
and Mozumder, Muzibur Rahman",
title="On generalized left (alpha, beta)-derivations in rings",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="893-905",
abstract="Let $R$ be a 2-torsion free ring and $U$ be a square closed Lie ideal of $R$. Suppose that $alpha, beta$ are automorphisms of $R$. An additive mapping $delta: R longrightarrow R$ is said to be a Jordan left $(alpha,beta)$-derivation of $R$ if $delta(x^2)=alpha(x)delta(x)+beta(x)delta(x)$ holds for all $xin R$. In this paper it is established that if $R$ admits an additive mapping $G : Rlongrightarrow R$ satisfying $G(u^2)=alpha(u)G(u)+alpha(u)delta(u)$ for all $uin U$ and a Jordan left $(alpha,alpha)$-derivation $delta$; and $U$ has a commutator which is not a left zero divisor, then $G(uv)=alpha(u)G(v)+alpha(v)delta(u)$ for all $u, vin U$. Finally, in the case of prime ring $R$ it is proved that if $G: R longrightarrow R$ is an additive mapping satisfying $G(xy)=alpha(x)G(y)+beta(y)delta(x)$ for all $x,y in R $ and a left $(alpha, beta)$-derivation $delta$ of $R$ such that $G$ also acts as a homomorphism or as an linebreak anti-homomorphism on a nonzero ideal $I$ of $R$, then either $R$ is commutative or $delta=0$ ~on $R$.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_296.html"
}
@Article{JelodariMamaghani2012,
author="Jelodari Mamaghani, Mohammad",
title="An automaton group: a computational case study",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="907-924",
abstract="We introduce a two generated weakly branch contracting automaton group $G$ which is generated by a two state automaton on a three letter alphabet. Using its branch structure and the finiteness nature of a sequence of its factor groups we compute the order of some of these factors. Furthermore some algebraic properties of $G$ are detected .",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_312.html"
}
@Article{Nashine2012,
author="Nashine, Hemant Kumar
and Altun, Ishak",
title="A common fixed point theorem on ordered metric spaces",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="925-934",
abstract="A common fixed point result for weakly increasing mappings satisfying generalized contractive type of Zhang in ordered metric spaces are derived.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_248.html"
}
@Article{Zhaojun2012,
author="Zhaojun, Wu
and Yuxian, Chen",
title="Uniqueness of meromorphic functions dealing with multiple values in an angular domain",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="935-945",
abstract="This paper uses the Tsuji’s characteristic to investigate the uniqueness of transcen- dental meromorphic function with shared values in an angular domain dealing with the multiple values which improve a result of J. Zheng.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_265.html"
}
@Article{Zhao2012,
author="Zhao, Renyu",
title="Uniserial modules of generalized power series",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="947-954",
abstract="Let R be a ring, M a right R-module and (S,≤) a strictly ordered monoid. In this paper we will show that if (S,≤) is a strictly ordered monoid satisfying the condition that 0 ≤ s for all s ∈ S, then the module [[MS,≤]] of generalized power series is a uniserial right [[RS,≤]] ]]-module if and only if M is a simple right R-module and S is a chain monoid.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_267.html"
}
@Article{Druta-Romaniuc2012,
author="Druta-Romaniuc, Simona-Luiza",
title="Para-Kahler tangent bundles of constant para-holomorphic sectional curvature",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="955-972",
abstract="We characterize the natural diagonal almost product (locally product) structures on the tangent bundle of a Riemannian manifold. We obtain the conditions under which the tangent bundle endowed with the determined structure and with a metric of natural diagonal lift type is a Riemannian almost product (locally product) manifold, or an (almost) para-Hermitian manifold. We find the natural diagonal (almost) para-K"ahlerian structures on the tangent bundle, and we study the conditions under which they have constant para-holomorphic sectional curvature.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_308.html"
}
@Article{Alghamdi2012,
author="Alghamdi, Ahmad M. A.
and Russo, Francesco G.",
title="A generalization of the probability that the commutator of two group elements is equal to a given element",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="973-986",
abstract="The probability that the commutator of two group elements is equal to a given element has been introduced in literature few years ago. Several authors have investigated this notion with methods of the representation theory and with combinatorial techniques. Here we illustrate that a wider context may be considered and show some structural restrictions on the group.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_303.html"
}
@Article{Ansari-Toroghy2012,
author="Ansari-Toroghy, Habibollah
and Farshadifar, Faranak",
title="Fully idempotent and coidempotent modules",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="987-1005",
abstract="In this paper, the notion of fully idempotent modules is defined and it is shown that this notion inherits most of the essential properties of the usual notion of von Neumann's regular rings. Furthermore, we introduce the dual notion of fully idempotent modules (that is, fully coidempotent modules) and investigate some properties of this class of modules.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_304.html"
}
@Article{Liu2012,
author="Liu, Kai
and Cao, Tingbin
and Liu, Xinling",
title="Some difference results on Hayman conjecture and uniqueness",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="1007-1020",
abstract="In this paper, we show that for any finite order entire function $f(z)$, the function of the form $f(z)^{n}[f(z+c)-f(z)]^{s}$ has no nonzero finite Picard exceptional value for all nonnegative integers $n, s$ satisfying $ngeq 3$, which can be viewed as a different result on Hayman conjecture. We also obtain some uniqueness theorems for difference polynomials of entire functions sharing one common value.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_306.html"
}
@Article{Zhanwei2012,
author="Zhanwei, Liu
and Mu, Xiaomin
and Wu, Guochang",
title="MRA parseval frame multiwavelets in L^2(R^d)",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="1021-1045",
abstract="In this paper, we characterize multiresolution analysis(MRA) Parseval frame multiwavelets in L^2(R^d) with matrix dilations of the form (D f )(x) = sqrt{2}f (Ax), where A is an arbitrary expanding dtimes d matrix with integer coefficients, such that |detA| =2. We study a class of generalized low pass matrix filters that allow us to define (and construct) the subclass of MRA tight frame multiwavelets. This leads us to an associated class of generalized scaling functions that are not necessarily obtained from a multiresolution analysis. We also investigate several properties of these classes of generalized multiwavelets, scaling functions, matrix filters and give some characterizations about them. Finally, we describe the matrix multipliers classes associated with Parseval frame multiwavelets(PFMWs) in L^2(R^d) and give an example to prove our theory.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_309.html"
}
@Article{Nilsrakoo2012,
author="Nilsrakoo, Weerayuth
and Saejung, Satit",
title="Iterative methods for finding nearest common fixed points of a countable family of quasi-Lipschitzian mappings",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="1047-1061",
abstract="We prove a strong convergence result for a sequence generated by Halpern's type iteration for approximating a common fixed point of a countable family of quasi-Lipschitzian mappings in a real Hilbert space. Consequently, we apply our results to the problem of finding a common fixed point of asymptotically nonexpansive mappings, an equilibrium problem, and a variational inequality problem for continuous monotone mappings.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_294.html"
}
@Article{Allen2012,
author="Allen, P
and Kim, H. S.
and Neggers, J",
title="Smarandache algebras and their subgroups",
journal="Bulletin of the Iranian Mathematical Society",
year="2012",
volume="38",
number="4",
pages="1063-1077",
abstract="In this paper we define S algebras and show that every finite group can be found in some S algebra. We define and study the S degree of a finite group and determine the S degree of several classes of finite groups such as cyclic groups, elementary abelian $p$-groups, and dihedral groups $D_p$.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_408.html"
}