2018-09-21T07:12:06Z
http://cjms.journals.umz.ac.ir/?_action=export&rf=summon&issue=148
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
Solving the inverse problem of determining an unknown control parameter in a semilinear parabolic equation
A.
Babaei
The inverse problem of identifying an unknown source control param- eter in a semilinear parabolic equation under an integral overdetermina- tion condition is considered. The series pattern solution of the proposed problem is obtained by using the weighted homotopy analysis method (WHAM). A description of the method for solving the problem and nding the unknown parameter is derived. Finally, two numerical examples are investigated to illustrate this method.
Semilinear parabolic equation
Inverse problem
Unknown control
parameter
Weighted homotopy analysis method
Series solution
2014
06
30
169
179
http://cjms.journals.umz.ac.ir/article_600_cc243241da9f458f21468d7601c3c57c.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
On the determination of asymptotic formula of the nodal points for the Sturm-Liouville equation with one turning point
A.
Dabbaghian
A.
Nematy
In this paper, the asymptotic representation of the corresponding eigenfunctions of the eigenvalues has been investigated. Furthermore, we obtain the zeros of eigenfunctions.
Turning point
Inverse nodal problem
Nodal Points
Eigenvalues
Eigenfunctions
2014
06
30
181
187
http://cjms.journals.umz.ac.ir/article_558_1ea2b9fea85bf459346ca1951f450d5b.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
GEOMETRIZATION OF HEAT FLOW ON VOLUMETRICALLY ISOTHERMAL MANIFOLDS VIA THE RICCI FLOW
S.
Kumar
The present article serves the purpose of pursuing Geometrization of heat ﬂow on volumetrically isothermal manifold by means of RF approach. In this article, we have analyzed the evolution of heat equation in a 3-dimensional smooth isothermal manifold bearing characteristics of Riemannian manifold and fundamental properties of thermodynamic systems. By making use of the notions of various curvatures, we have discussed diﬀerent types of heat diﬀusion equation for our volumetrically isothermal manifold and its isothermal surfaces. Finally, we have delineated a heat diﬀusion model for such isothermal manifold and by decomposing it into isothermal surfaces we have developed equation for heat diﬀusion.
Ricci ﬂow
2014
12
30
189
205
http://cjms.journals.umz.ac.ir/article_561_6de6a68d5e27c5911dc790944ccef16e.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
INFINITELY MANY SOLUTIONS FOR A CLASS OF P-BIHARMONIC PROBLEMS WITH NEUMANN BOUNDARY CONDITIONS
S.
MIR
M.B.
Ghaemi
G.
A. Afroozi
The existence of inﬁnitely many solutions is established for a class of nonlinear functionals involving the p-biharmonic operator with nonhomoge- neous Neumann boundary conditions. Using a recent critical-point theorem for nonsmooth functionals and under appropriate behavior of the nonlinear term and nonhomogeneous Neumann boundary conditions, we obtain the result.
2014
12
31
207
219
http://cjms.journals.umz.ac.ir/article_562_ae95a606f7a40a69bbb2b5e89a0724c9.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
The Lotka-Volterra Predator-Prey Equations
M. H.
Rahmani Doust
S.
GHolizade
One may find out the application of mathematics in the areas of ecology, biology, environmental sciences etc. Mathematics is particulary used in the problem of predator-prey known as lotka-Volterra predator-prey equations. Indeed, differential equations is employed very much in many areas of other sciences. However, most of natural problems involve some unknown functions. In this paper, an environmental case containing two related populations of prey and predator species is studied. As the classic Lotka-Volterra assumptions are unrealistic, it is assumed that there is logistic behavior for both existing species. We see that two populations influence the size of each other.
Lotka-Volterra model
Prey-Predator
Growth Rate
2014
12
31
221
225
http://cjms.journals.umz.ac.ir/article_563_4f4029a1effb09c28117f6b8dcb91554.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
B-Spline Finite Element Method for Solving Linear System of Second-Order Boundary Value Problems
A.
Yazdani
S
Gharbavi
In this paper, we solve a linear system of second-order boundary value problems by using the quadratic B-spline nite el- ement method (FEM). The performance of the method is tested on one model problem. Comparisons are made with both the analyti- cal solution and some recent results.The obtained numerical results show that the method is ecient.
Finite element method
Quadratic B-splines
Bound-
ary Value Problems
2014
12
31
227
232
http://cjms.journals.umz.ac.ir/article_586_2e0b23260cf10fb4d2267af2db08891b.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
NOTES ON REGULAR MULTIPLIER HOPF ALGEBRAS
H.
Abbasi
G. A.
HAGHIGHATDOOST
In this paper, we associate canonically a precyclic mod- ule to a regular multiplier Hopf algebra endowed with a group-like projection and a modular pair in involution satisfying certain con- dition
Hopf algebra
Multiplier Hopf algebra
precyclic mod-
ule
2014
12
31
233
251
http://cjms.journals.umz.ac.ir/article_597_810a86d28e2b46757c3e3ab7ed56b836.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
The Bernoulli Ritz-collocation method to the solution of modelling the pollution of a system of lakes
E.
Sokhanvar
S.
yousefi
Pollution has become a very serious threat to our environment. Monitoring pollution is the rst step toward planning to save the environment. The use of dierential equations, monitoring pollution has become possible. In this paper, a Ritz-collocation method is introduced to solve non-linear oscillatory systems such as modelling the pollution of a system of lakes. The method is based upon Bernoulli polynomials. These polynomials are rst presented. The Bernoulli Ritz-collocation method is then utilized to reduce modelling the pollution of a system of lakes to the solution of algebraic equations. An illustrative example is included to demonstrate the validity and applicability of the proposed method.
Bernoulli polynomials
Modelling the pollution of a system of lakes
Ritz-collocation method
2014
12
31
253
265
http://cjms.journals.umz.ac.ir/article_598_47bcf16e4595ba834ceedd82aa7c1649.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
GROUPOID ASSOCIATED TO A SMOOTH MANIFOLD
H.
Abbasi
G. A.
HAGHIGHATDOOST
In this paper, we introduce the structure of a groupoid associated to a vector field on a smooth manifold. We show that in the case of the $1$-dimensional manifolds, our groupoid has a smooth structure such that makes it into a Lie groupoid. Using this approach, we associated to every vector field an equivalence relation on the Lie algebra of all vector fields on the smooth manifolds.
Groupoid
Lie Groupoid
2014
12
31
267
275
http://cjms.journals.umz.ac.ir/article_602_e01a665ec9d80a7a0fb61cac6b2f85a4.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
Operator Valued Series and Vector Valued Multiplier Spaces
C.
Swartz
Let $X,Y$ be normed spaces with $L(X,Y)$ the space of continuous linear operators from $X$ into $Y$. If ${T_{j}}$ is a sequence in $L(X,Y)$, the (bounded) multiplier space for the series $sum T_{j}$ is defined to be [ M^{infty}(sum T_{j})={{x_{j}}in l^{infty}(X):sum_{j=1}^{infty}% T_{j}x_{j}text{ }converges} ] and the summing operator $S:M^{infty}(sum T_{j})rightarrow Y$ associated with the series is defined to be $S({x_{j}})=sum_{j=1}^{infty}T_{j}x_{j}$. In the scalar case the summing operator has been used to characterize completeness, weakly unconditionall Cauchy series, subseries and absolutely convergent series. In this paper some of these results are generalized to the case of operator valued series The corresponding space of weak multipliers is also considered.
multiplier convergent series
multipliers
compact operators
absolutely summing operators
summing operator
2014
12
31
277
288
http://cjms.journals.umz.ac.ir/article_625_ea36170ea52e02ae018c4557da098975.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
LI-YORKE CHAOTIC GENERALIZED SHIFT DYNAMICAL SYSTEMS
F.
Ayatollah Zadeh Shirazi
J.
Nazarian Sarkooh
In this text we prove that in generalized shift dynamical system $(X^Gamma,sigma_varphi)$ for finite discrete $X$ with at least two elements, infinite countable set $Gamma$ and arbitrary map $varphi:GammatoGamma$, the following statements are equivalent: - the dynamical system $(X^Gamma,sigma_varphi)$ is Li-Yorke chaotic; - the dynamical system $(X^Gamma,sigma_varphi)$ has an scrambled pair; - the map $varphi:GammatoGamma$ has at least one non-quasi-periodic point.
Generalized shift
Li-Yorke chaos
Scrambled pair
2014
12
31
289
295
http://cjms.journals.umz.ac.ir/article_651_7d6d873624d798bcdeada5358b4a3a53.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
Ginsburg-Pitaevski-Gross differential equation with the Rosen-Morse and modified Woods-Saxon potentials
B.
Pourhassan
J.
Khalilzadeh
In this paper, we consider non-linear Ginsburg-Pitaevski-Gross equation with the Rosen-Morse and modifiedWoods-Saxon potentials which is corresponding to the quantum vortices and has important applications in turbulence theory. We use the Runge- Kutta-Fehlberg approximation method to solve the resulting non-linear equation.
Quantum Vortices
Non-Linear Differential Equation
Wave Function
2014
12
31
297
304
http://cjms.journals.umz.ac.ir/article_653_3cd3157a322a535ae4a6a25909a4bfb3.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
Simplest Equation Method for nonlinear solitary waves in Thomas- Fermi plasmas
A.
Valinejad
A.
Neirameh
The Thomas-Fermi (TF) equation has proved to beuseful for the treatment of many physical phenomena. In this pa-per, the traveling wave solutions of the KdV equation is investi-gated by the simplest equation method. Also, the effect of differentparameters on these solitary waves is considered. The numericalresults is conformed the good accuracy of presented method.
Simplest equation method
Thomas-Fermi plasmas
KdV equation
Ion acoustic waves
2014
12
31
305
316
http://cjms.journals.umz.ac.ir/article_882_f5e4417be7c3ac0e79398618da6c9f60.pdf
Caspian Journal of Mathematical Sciences (CJMS)
CJMS
1735-0611
1735-0611
2014
3
2
SOLVING FUZZY LINEAR PROGRAMMING PROBLEMS WITH LINEAR MEMBERSHIP FUNCTIONS-REVISITED
B.
Farhadinia
Recently, Gasimov and Yenilmez proposed an approach for solving two kinds of fuzzy linear programming (FLP) problems. Through the approach, each FLP problem is first defuzzified into an equivalent crisp problem which is non-linear and even non-convex. Then, the crisp problem is solved by the use of the modified subgradient method. In this paper we will have another look at the earlier defuzzification process developed by Gasimov and Yenilmez in view of a perfectly acceptable remark in fuzzy contexts. Furthermore, it is shown that if the modified defuzzification process is used to solve FLP problems, some interesting results are appeared.
Fuzzy linear programming problems
Modified subgradient method
Fuzzy
decisive set method
2014
12
31
317
328
http://cjms.journals.umz.ac.ir/article_557_7b0867c51246f42a8eebe333df9e6ce1.pdf