OTHERS_CITABLE
On Generalized Coprime Graphs
Paul Erdos defined the concept of coprime graph and studied about cycles in coprime graphs. In this paper this concept is generalized and a new graph called Generalized coprime graph is introduced. Having observed certain basic properties of the new graph it is proved that the chromatic number and the clique number of some generalized coprime graphs are equal.
http://ijmsi.ir/article-1-319-en.pdf
2014-11-04T10:20:15
1
6
10.7508/ijmsi.2014.02.001
Coprime graph
Semi-perfect
Clique number
Chromatic number.
S.
Mutharasu
skannanmunna@yahoo.com
1
Manonmaniam Sundaranar University
AUTHOR
N.
Mohamed Rilwan
rilwan2020@gmail.com
2
Manonmaniam Sundaranar University
AUTHOR
M. K.
Angel Jebitha
angel_jebitha@yahoo.co.in
3
Manonmaniam Sundaranar University
AUTHOR
T.
Tamizh Chelvam
tamche59@gmail.com
4
AUTHOR
OTHERS_CITABLE
Local Cohomology with Respect to a Cohomologically Complete Intersection Pair of Ideals
Let $(R,fm,k)$ be a local Gorenstein ring of dimension $n$. Let $H_{I,J}^i(R)$ be theĀ local cohomology with respect to a pair of ideals $I,J$ and $c$ be the $inf{i|H_{I,J}^i(R)neq0}$. A pair of ideals $I, J$ is called cohomologically complete intersection if $H_{I,J}^i(R)=0$ for all $ineq c$. It is shown that, when $H_{I,J}^i(R)=0$ for all $ineq c$, (i) a minimal injective resolution of $H_{I,J}^c(R)$ presents like that of a Gorenstein ring (ii) $Hom_R(H_{I,J}^c(R),H_{I,J}^c(R))simeq R$, where $(R,fm)$ is a complete ring. Also we get an estimate of theĀ dimension of $H_{I,J}^i(R)$.
http://ijmsi.ir/article-1-640-en.pdf
2014-11-04T10:20:15
7
13
10.7508/ijmsi.2014.02.002
Vanishing
Local cohomology
Gorenstein ring.
A.
Pour Eshmanan Talemi
poureshmanan@iaurasht.ac.ir
1
AUTHOR
A.
Tehranian
tehranian@srbiau.ac.ir
2
AUTHOR
OTHERS_CITABLE
Strongly almost ideal convergent sequences in a locally convex space defined by Musielak-Orlicz function
In this article, we introduce a new class of ideal convergent sequence spaces using an infinite matrix, Musielak-Orlicz function and a new generalized difference matrix in locally convex spaces. We investigate some linear topological structures and algebraic properties of these spaces. We also give some relations related to these sequence spaces.
http://ijmsi.ir/article-1-522-en.pdf
2014-11-04T10:20:15
15
35
10.7508/ijmsi.2014.02.003
$I$-convergence
difference space
Musielak-Orlicz function.
B.
Hazarika
bh_rgu@yahoo.co.in
1
Rajiv Gandhi University
AUTHOR
OTHERS_CITABLE
The p-median and p-center Problems on Bipartite Graphs
Let $G$ be a bipartite graph. In this paper we consider the two kind of location problems namely $p$-center and $p$-median problems on bipartite graphs. The $p$-center and $p$-median problems asks to find a subset of vertices of cardinality $p$, so that respectively the maximum and sum of the distances from this set to all other vertices in $G$ is minimized. For each case we present some properties to find exact solutions.
http://ijmsi.ir/article-1-641-en.pdf
2014-11-04T10:20:15
37
43
10.7508/ijmsi.2014.02.004
Location theory
$p$-median
$p$-center
Bipartite graphs.
J.
Fathali
fathali@shahroodut.ac.ir
1
AUTHOR
N.
Jafari Rad
n.jafarirad@shahroodut.ac.ir
2
AUTHOR
S.
Rahimi Sherbaf
srahimi@shahroodut.ac.ir
3
AUTHOR
OTHERS_CITABLE
Chromaticity of Turan Graphs with At Most Three Edges Deleted
Let $P(G,lambda)$ be the chromatic polynomial of a graph $G$. A graph $G$ ischromatically unique if for any graph $H$, $P(H, lambda) = P(G,lambda)$ implies $H$ is isomorphic to $G$. In this paper, we determine the chromaticity of all Tur'{a}n graphs with at most three edges deleted. As a by product, we found many families of chromatically unique graphs and chromatic equivalence classes of graphs.
http://ijmsi.ir/article-1-642-en.pdf
2014-11-04T10:20:15
45
64
10.7508/ijmsi.2014.02.005
Chromatic polynomial
Chromatic uniqueness
Turan graph.
G.-C.
Lau
laugc@johor.uitm.edu.my
1
AUTHOR
Y.-H.
Peng
yhpeng@fsas.upm.edu.my
2
AUTHOR
S.
Alikhani
alikhani@yazd.ac.ir
3
AUTHOR
OTHERS_CITABLE
A Semidefinite Optimization Approach to Quadratic Fractional Optimization with a Strictly Convex Quadratic Constraint
In this paper we consider a fractional optimization problem that minimizes the ratio of two quadratic functions subject to a strictly convex quadratic constraint. First using the extension of Charnes-Cooper transformation, an equivalent homogenized quadratic reformulation of the problem is given. Then we show that under certain assumptions, it can be solved to global optimality using semidefinite optimization relaxation in polynomial time.
http://ijmsi.ir/article-1-643-en.pdf
2014-11-04T10:20:15
65
71
10.7508/ijmsi.2014.02.006
Quadratic fractional optimization
Semidefinite optimization relaxation
Global optimization.
M.
Salahi
salahim@guilan.ac.ir
1
AUTHOR
S.
Fallahi
saeedf808@gmail.com
2
AUTHOR
OTHERS_CITABLE
On Some Fractional Systems of Difference Equations
This paper deal with the solutions of the systems of difference equations $$x_{n+1}=frac{y_{n-3}y_nx_{n-2}}{y_{n-3}x_{n-2}pm y_{n-3}y_n pm y_nx_{n-2}}, ,y_{n+1}=frac{y_{n-2}x_{n-1}}{ 2y_{n-2}pm x_{n-1}},,nin mathbb{N}_{0},$$ where $mathbb{N}_{0}=mathbb{N}cup left{0right}$, and initial values $x_{-2},, x_{-1},,x_{0},,y_{-3},,y_{-2},,y_{-1},,y_{0}$ are non-zero real numbers.
http://ijmsi.ir/article-1-524-en.pdf
2014-11-04T10:20:15
73
86
10.7508/ijmsi.2014.02.007
System of difference equations
Form of the solutions
Periodicity.
N.
Touafek
nouressadat_touafek@yahoo.com
1
Jijel University
AUTHOR
OTHERS_CITABLE
Some Results on Convexity and Concavity of Multivariate Copulas
This paper provides some results on different types of convexity and concavity in the class of multivariate copulas. We also study their properties and provide several examples to illustrate our results.
http://ijmsi.ir/article-1-644-en.pdf
2014-11-04T10:20:15
87
100
10.7508/ijmsi.2014.02.008
Componentwise concavity
Copula
Quasi-concavity
Schur-concavity.
A.
Dolati
adolati@yazd.ac.ir
1
AUTHOR
A.
Dehgan Nezhad
anezhad@yazd.ac.ir
2
AUTHOR
OTHERS_CITABLE
Application of the Norm Estimates for Univalence of Analytic Functions
By using norm estimates of the pre-Schwarzian derivatives for certain family of analytic functions, we shall give simple sufficient conditions for univalence of analytic functions.
http://ijmsi.ir/article-1-377-en.pdf
2014-11-04T10:20:15
101
108
10.7508/ijmsi.2014.02.009
Starlike functions
Differential subordination
Integral operators.
R.
Aghalary
1
AUTHOR
OTHERS_CITABLE
On the Ultramean Construction
We use the ultramean construction to prove linear compactness theorem. We also extend the Rudin-Keisler ordering to maximal probability charges and characterize it by embeddings of power ultrameans.
http://ijmsi.ir/article-1-391-en.pdf
2014-11-04T10:20:15
109
119
10.7508/ijmsi.2014.02.010
Continuous logic
Ultramean
Linear compactness
Rudin-Keisler ordering.
M.
Bagheri
bagheri@modares.ac.ir
1
Tarbiat-Modares
AUTHOR
CASE_STUDY
ABSTRACTS IN PERSIAN - Vol. 9, No. 2
Please see the full text contains the Pesian abstracts for this volume.
http://ijmsi.ir/article-1-843-en.pdf
2016-01-27T10:20:15
121
131
Name of Authors
in This Volume
1
AUTHOR