Volume
8, No.
2,
June
2015
Articles 


Edge Maximal Graphs Containing No Specific Wheels
Let k ≥ 4 be a positive integer. Let G(n;W_{k}) denote the class of graphs on n vertices containing no wheel W_{k} as a subgraph. In this paper, we study the following: (1) Edge maximal graphs containing no odd wheels. Furthermore, we characterize the extremal graphs. (2) The edge maximal graph containing no even wheels. (3) The edge maximal graph containing no specific even wheels. 

Mohammad Bataineh M.M.M.Jaradat
A.M.M. Jaradat
JJMS, 2015, 8(2), 107120

Rings on TorsionFree Groups of Rank One and Two
This paper gives a survey about the possible rings which may be defined over torsionfree groups of rank one and two. In fact, we give a list of such rings which have been studied by some mathematicians over the past decades. In particular, we give a review of the authors' studies to determine such rings. 

A. Najafizadeh
A. M. Aghdam
JJMS, 2015, 8(2), 121154

Exactness
of
Second
Order
Ordinary
Differential
Equations
and
Integrating
Factors
The
principle
of
finding
an
integrating
factor
for a
none
exact
differential
equations
is
extended
to
equations
of
second
order.
If the
second
order
equation
is not
exact,
under
certain
conditions,
an
integrating
factor
exists
that
transforms
it to an
exact
one. In
this
paper we
give
explicit
forms
for
integrating
factors
of the
second
order
differential
equations. 

Rami
AlAhmad
M. AlJararha
H. Al Mefleh
JJMS,
2015, 8(2),
155167

Quasi
αgrwOpen
Maps in
Topological
Spaces
We
introduce
the
notions
of
αgeneralized
regular
weakly
open
sets,
Quasi
αgeneralized
regular
weakly
open
maps and
Quasi
αgeneralized
regular
weakly
closed
maps in
topological
spaces.


N.
Selvanayaki
Gnanambal
Ilango
JJMS,
2015, 8(2),
169177

Extension
of
Cerone's
Generalizations
of
Steffensen's
Inequality
The aim
of this
paper is
to
extend
Cerone's
generalization
of Steffensen's
inequality
to
positive
finite
measures
and to
give
weaker
conditions
for
obtained
extension.
Further,
our
intension
is to
obtain
extensions
of known
generalizations
of
Steffensen's
inequality
in order
to allow
bounds
that
involve
any two
subintervals
using
measure
theoretic
aspects. 

Julije
Jaksetic
Josip
Pecaric
Ksenija
Smoljak
Kalamir
JJMS,
2015, 8(2),
179194

