ORIGINAL_ARTICLE
Newton-Product integration for a Two-phase Stefan problem with Kinetics
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.
http://bims.iranjournals.ir/article_269_d77a723b16e1070e635dd7aabf3cbdec.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
853
868
Two-phase Stefan problem
Kinetic function
Newton's
method
Product integration
Nonlinear Volterra integral equations
B.
Babayar-Razlighi
Babayar@tabrizu.ac.ir
true
1
University of Tabriz
University of Tabriz
University of Tabriz
AUTHOR
Karim
Ivaz
ivaz@tabrizu.ac.ir
true
2
University of Tabriz
University of Tabriz
University of Tabriz
LEAD_AUTHOR
M.
Mokhtarzadeh
MrMokhtarzadeh@gmail.com
true
3
Institute for
studies in
theoretical physics and mathematics
Institute for
studies in
theoretical physics and mathematics
Institute for
studies in
theoretical physics and mathematics
AUTHOR
A.
Badamchizadeh
Badamchi_ali@yahoo.com
true
4
University of Tabriz
University of Tabriz
University of Tabriz
AUTHOR
ORIGINAL_ARTICLE
Multiple point of self-transverse immesions of certain manifolds
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.
http://bims.iranjournals.ir/article_292_f640c8c7d63984f075314fc293f12751.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
869
882
Immersion
Hurewicz
homomorphism
spherical classes
Stiefel-Whitney number
Mohammad Ali
Asadi-Golmankhaneh
masadig@yahoo.com
true
1
Assistant Prof. Mathematics Department, Urmia University
Assistant Prof. Mathematics Department, Urmia University
Assistant Prof. Mathematics Department, Urmia University
LEAD_AUTHOR
ORIGINAL_ARTICLE
Entropy operator for continuous dynamical systems of finite topological entropy
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.
http://bims.iranjournals.ir/article_223_e9885c9254062cfa69de1fd24b6324d7.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
883
892
Entropy
entropy operator
dynamical system
Mehdi
Rahimi
m10.rahimi@gmail.com
true
1
Amirkabir University of technology
Amirkabir University of technology
Amirkabir University of technology
LEAD_AUTHOR
Abdolhamid
Riazi
ph.riazi@yahoo.com
true
2
Amirkabir University of technology
Amirkabir University of technology
Amirkabir University of technology
AUTHOR
ORIGINAL_ARTICLE
On generalized left (alpha, beta)-derivations in rings
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 $R$.
http://bims.iranjournals.ir/article_296_f014a56e90c11a757243288bb277b4db.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
893
905
Prime ring
Lie ideal
Jordan left (alpha,beta)-derivation
Mohammad
Ashraf
mashraf80@hotmail.com
true
1
Aligarh Muslim University
Aligarh Muslim University
Aligarh Muslim University
AUTHOR
Shakir
Ali
shakir.ali.mm@amu.ac.in
true
2
Aligarh Muslim University
Aligarh Muslim University
Aligarh Muslim University
LEAD_AUTHOR
Nadeem
Rehman
rehman100@gmail.com
true
3
Aligarh Muslim University
Aligarh Muslim University
Aligarh Muslim University
AUTHOR
Muzibur
Mozumder
mrm7862000@yahoo.co.in
true
4
Aligarh Muslim University
Aligarh Muslim University
Aligarh Muslim University
AUTHOR
ORIGINAL_ARTICLE
An automaton group: a computational case study
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 .
http://bims.iranjournals.ir/article_312_875ffba1c361564addaaeccfb6b42113.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
907
924
Automaton group
weakly branch
contracting group
exponential growth
Mohammad
Jelodari Mamaghani
j_mamaghani@atu.ac.ir
true
1
Professor of mathematics Dept of maths and stats, Allameh tabatabaei univ.
Professor of mathematics Dept of maths and stats, Allameh tabatabaei univ.
Professor of mathematics Dept of maths and stats, Allameh tabatabaei univ.
LEAD_AUTHOR
ORIGINAL_ARTICLE
A common fixed point theorem on ordered metric spaces
A common fixed point result for weakly increasing mappings satisfying generalized contractive type of Zhang in ordered metric spaces are derived.
http://bims.iranjournals.ir/article_248_61bfef788cf33de9b3b6ee9948a43e76.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
925
934
fixed point
complete metric space
partially ordered set
Hemant
Nashine
hemantnashine@rediffmail.com
true
1
Disha Institute of Management and Technology
Disha Institute of Management and Technology
Disha Institute of Management and Technology
AUTHOR
Ishak
Altun
ishakaltun@yahoo.com
true
2
Kirikkale University, Faculty of Science and Arts
Kirikkale University, Faculty of Science and Arts
Kirikkale University, Faculty of Science and Arts
LEAD_AUTHOR
ORIGINAL_ARTICLE
Uniqueness of meromorphic functions dealing with multiple values in an angular domain
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.
http://bims.iranjournals.ir/article_265_c7a4f751f9d2ac1abede02daa6a237ef.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
935
945
Tsuji’s characteristic
uniqueness
angular domain
multiple values
Wu
Zhaojun
wuzj52@hotmail.com
true
1
school of Mathematics and
Statistics, Xianning University, Xianning, Hubei,
P. R. China, 437100
school of Mathematics and
Statistics, Xianning University, Xianning, Hubei,
P. R. China, 437100
school of Mathematics and
Statistics, Xianning University, Xianning, Hubei,
P. R. China, 437100
LEAD_AUTHOR
Chen
Yuxian
44976882@qq.com
true
2
Department of Mathematics, Xinyu University Xinyu, Jiangxi Province, 338000, P. R.
China
Department of Mathematics, Xinyu University Xinyu, Jiangxi Province, 338000, P. R.
China
Department of Mathematics, Xinyu University Xinyu, Jiangxi Province, 338000, P. R.
China
AUTHOR
ORIGINAL_ARTICLE
Uniserial modules of generalized power series
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.
http://bims.iranjournals.ir/article_267_7d5809a8364501044da31ce9f9f28849.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
947
954
uniserial module
chain monoid
generalized power series ring
generalized power series module
Renyu
Zhao
zhaory@nwnu.edu.cn
true
1
Northwest Normal University
Northwest Normal University
Northwest Normal University
LEAD_AUTHOR
ORIGINAL_ARTICLE
Para-Kahler tangent bundles of constant para-holomorphic sectional curvature
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.
http://bims.iranjournals.ir/article_308_b220cc7c0d3e496afd0a4df3a423d435.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
955
972
natural lifts
almost product structures
para-Hermitian structures
para-K"ahler structures
para-holomorphic sectional curvature
Simona-Luiza
Druta-Romaniuc
simonadruta@yahoo.com
true
1
Department of Sciences, Al. I. Cuza University
Department of Sciences, Al. I. Cuza University
Department of Sciences, Al. I. Cuza University
LEAD_AUTHOR
ORIGINAL_ARTICLE
A generalization of the probability that the commutator of two group elements is equal to a given element
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.
http://bims.iranjournals.ir/article_303_c20073079049ede5f1ba75c86fa2eb03.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
973
986
Commutativity degree
relative n-th nilpotency degree
probability of
commuting pairs
characters
Ahmad
Alghamdi
amghamdi@uqu.edu.sa
true
1
Department of Mathematics, University Umm Alqura
Department of Mathematics, University Umm Alqura
Department of Mathematics, University Umm Alqura
AUTHOR
Francesco G.
Russo
francescog.russo@yahoo.com
true
2
Department of Mathematics, University of Palermo
Department of Mathematics, University of Palermo
Department of Mathematics, University of Palermo
LEAD_AUTHOR
ORIGINAL_ARTICLE
Fully idempotent and coidempotent modules
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.
http://bims.iranjournals.ir/article_304_6d9a658da1b800cac3492316784b678d.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
987
1005
Idempotent submodule
fully idempotent module
coidempotent submodule
copure submodule
and fully coidempotent module
Habibollah
Ansari-Toroghy
ansari@guilan.ac.ir
true
1
University of Guilan
University of Guilan
University of Guilan
LEAD_AUTHOR
Faranak
Farshadifar
farshadifar@guilan.ac.ir
true
2
University of Guilan
University of Guilan
University of Guilan
AUTHOR
ORIGINAL_ARTICLE
Some difference results on Hayman conjecture and uniqueness
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.
http://bims.iranjournals.ir/article_306_332a41daa98fd9beeb51176a86683aae.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
1007
1020
Entire functions
Difference
finite order
uniqueness
Value sharing
Kai
Liu
liukai418@126.com
true
1
Nanchang university, Department of mathematics
Nanchang university, Department of mathematics
Nanchang university, Department of mathematics
LEAD_AUTHOR
Tingbin
Cao
tbcao@ncu.edu.cn
true
2
Nanchang university, Department of mathematics
Nanchang university, Department of mathematics
Nanchang university, Department of mathematics
AUTHOR
Xinling
Liu
sdliuxinling@hotmail.com
true
3
Nanchang university, Department of mathematics
Nanchang university, Department of mathematics
Nanchang university, Department of mathematics
AUTHOR
ORIGINAL_ARTICLE
MRA parseval frame multiwavelets in L^2(R^d)
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.
http://bims.iranjournals.ir/article_309_01a3168b09b684df64188d271d92cc75.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
1021
1045
frame
Matrix ﬁlter
Pseudo-scaling function
MRA Parseval frame multiwavelets
Matrix multiwavelets multiplier
Liu
Zhanwei
changgengliu@163.com
true
1
School of Information Engineering, Zhengzhou University
School of Information Engineering, Zhengzhou University
School of Information Engineering, Zhengzhou University
AUTHOR
Xiaomin
Mu
iexmmu@zzu.edu.cn
true
2
School of Information Engineering, Zhengzhou University
School of Information Engineering, Zhengzhou University
School of Information Engineering, Zhengzhou University
AUTHOR
Guochang
Wu
archang-0111@163.com
true
3
Department of Applied
Mathematics, Henan
University of Economics and Law
Department of Applied
Mathematics, Henan
University of Economics and Law
Department of Applied
Mathematics, Henan
University of Economics and Law
AUTHOR
ORIGINAL_ARTICLE
Iterative methods for finding nearest common fixed points of a countable family of quasi-Lipschitzian mappings
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.
http://bims.iranjournals.ir/article_294_985ac6bbba0e6961cfd2afe91f6cd137.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
1047
1061
Asymptotically nonexpansive mapping
equilibrium problem
quasi-Lipschitzian mapping
strong convergence theorem
variational inequality
problem
Weerayuth
Nilsrakoo
nilsrakoo@hotmail.com
true
1
Department of Mathematics, Statistics and Computer,
Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani
34190, Thailand
Department of Mathematics, Statistics and Computer,
Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani
34190, Thailand
Department of Mathematics, Statistics and Computer,
Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani
34190, Thailand
LEAD_AUTHOR
Satit
Saejung
saejung@kku.ac.th
true
2
Department of
Mathematics, Khon Kaen University, Khon Kaen 40002, Thailand
Department of
Mathematics, Khon Kaen University, Khon Kaen 40002, Thailand
Department of
Mathematics, Khon Kaen University, Khon Kaen 40002, Thailand
AUTHOR
ORIGINAL_ARTICLE
Smarandache algebras and their subgroups
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 $D_p$.
http://bims.iranjournals.ir/article_408_9aed5a7ca47d5a6c66edeb8918a979c6.pdf
2012-12-15T11:23:20
2018-12-17T11:23:20
1063
1077
P
Allen
true
1
University of Alabama
University of Alabama
University of Alabama
AUTHOR
H.
Kim
true
2
Hanyang University and Research Institute for Natural Sciences
Hanyang University and Research Institute for Natural Sciences
Hanyang University and Research Institute for Natural Sciences
LEAD_AUTHOR
J
Neggers
true
3
University of Alabama
University of Alabama
University of Alabama
AUTHOR