2019-10-16T08:39:20+03:30
http://ijmsi.ir/browse.php?mag_id=17&slc_lang=en&sid=1
17-572
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
The Wave Equation in Non-classic Cases: Non-self Adjoint with Non-local and Non-periodic Boundary Conditions
Mohammad
Jahanshahi
jahanshahi@azaruniv.edu
Asghar
Ahmadkhanlu
s.a.ahmadkhanlu@azaruniv.edu
In this paper has been studied the wave equation in some non-classic cases. In the rst case boundary conditions are non-local and non-periodic. At that case the associated spectral problem is a self-adjoint problem and consequently the eigenvalues are real. But the second case the associated spectral problem is non-self-adjoint and consequently the eigenvalues are complex numbers,in which two cases, the solutions of the problem are constructed by Fourier method. By compatibility conditions and asymptotic expansions of the Fourier coe cients, the convergence of series solutions are proved. At last series solution are established and the uniqueness of the solution is proved by a special way which has not been used in classic texts. .
Wave equation
Non-local &
non-periodic Boundary Conditions
Asymptotic expansion.
2014
5
01
1
12
http://ijmsi.ir/article-1-572-en.pdf
10.7508/ijmsi.2014.01.001
17-574
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
On Hyper Pseudo BCK-algebras
R. A.
Borzooei
borzooei@sbu.ac.ir
A.
Rezazadeh
Rezazade2008@gmail.com
R.
Ameri
rez_ameri@yahoo.com
In this paper, we introduce the notion of hyper pseudo B C K - algebras, which is a generalization of pseudo BCK -algebras and hyper BCK -algebras and we investigates some related properties. In follow, we de ne some kinds of hyper pseudo BCK -ideals of a hyper pseudo BCK - algebra and we find the relations among them. Finally, we characterize the hyper pseudo BCK -ideals of type 4 generated by a nonempty subset.
Hyper pseudo BCK-algebras
Hyper pseudo BCK-ideals
Generated hyper pseudo BCK-ideals .
2014
5
01
13
29
http://ijmsi.ir/article-1-574-en.pdf
10.7508/ijmsi.2014.01.002
17-300
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
Diagonal and Monomial Solutions of the Matrix Equation AXB=C
Massoud
Aman
mamann@birjand.ac.ir
In this article, we consider the matrix equation $AXB=C$, where A, B, C are given matrices and give new necessary and sufficient conditions for the existence of the diagonal solutions and monomial solutions to this equation. We also present a general form of such solutions. Moreover, we consider the least squares problem $min_X |C-AXB |_F$ where $X$ is a diagonal or monomial matrix. The explicit expressions of the optimal solution and the minimum norm solution are both provided.
Matrix equation
Diagonal matrix
Monomial matrix
Least squares problem.
2014
5
01
31
42
http://ijmsi.ir/article-1-300-en.pdf
10.7508/ijmsi.2014.01.003
17-573
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
On the Graphs Related to Green Relations of Finite Semigroups
A.
Gharibkhajeh
a_gharib@iau-tnb.ac.ir
H.
Doostie
doostih@gmail.com
In this paper we develop an analog of the notion of the con- jugacy graph of nite groups for the nite semigroups by considering the Green relations of a nite semigroup. More precisely, by de ning the new graphs $Gamma_{L}(S)$, $Gamma_{H}(S)$, $Gamma_{J}(S)$ and $Gamma_{D}(S)$ (we name them the Green graphs) related to the Green relations L R J H and D of a nite semigroup S , we first attempt to prove that the graphs $Gamma_{D}(S)$ and $Gamma_{H}(S)$ have exactly one connected component, and this graphs for regu- lar semigroups are complete. And secondly, we give a necessary condition for a nite semigroup to be regular. This study shows an intrinsic di er- ence between the conjugacy graphs (of groups) and the Green graphs (of semigroups) as well. Finally, our calculations include two kinds of semi- groups, mostly involving the well known Lucas numbers, and examining the proved assertions.
Conjugacy graph
Regular semigroup
Green relations.
2014
5
01
43
51
http://ijmsi.ir/article-1-573-en.pdf
10.7508/ijmsi.2014.01.004
17-339
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
Binary Multiquasigroups with Medial-Like Equations
Amir
Ehsani
a.ehsani@mahshahriau.ac.ir
Yuri
Movsisyan
yurimovsisyan@yahoo.com
In this paper paramedial, co-medial and co-paramedial binary multiquasigroups are considered and a characterization of the corresponding component operations of these multiquasigroups is given.
Medial
Paramedial
Co-medial
Co-paramedial
Multiquasigroup
Mode.
2014
5
01
53
62
http://ijmsi.ir/article-1-339-en.pdf
10.7508/ijmsi.2014.01.005
17-345
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
Generalized Symmetric Berwald Spaces
Parastoo
Habibi
p.habibi@iau-astara.ac.ir
Asadollah
Razavi
arazavi@aut.ac.ir
In this paper we study generalized symmetric Berwald spaces. We show that if a Berwald space $(M,F)$ admits a parallel $s-$structure then it is locally symmetric. For a complete Berwald space which admits a parallel s-structure we show that if the flag curvature of $(M,F)$ is everywhere nonzero, then $F$ is Riemannian.
Homogeneous Finsler space
Symmetric space
Generalized symmetric space
Berwald space.
2014
5
01
63
69
http://ijmsi.ir/article-1-345-en.pdf
10.7508/ijmsi.2014.01.006
17-360
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
Some Results on TVS-cone Normed Spaces and Algebraic Cone Metric Spaces
Assadollah
Niknam
Saeedeh
Shamsi Gamchi
Mohammad
Janfada
In this paper we introduce the cone bounded linear mapping and demonstrate a proof to show that the cone norm is continuous. Among other things, we prove the open mapping theorem and the closed graph theorem in TVS-cone normed spaces. We also show that under some restrictions on the cone, two cone norms are equivalent if and only if the topologies induced by them are the same. In the sequel, we introduce the notion of algebraically cone metric and we will show that every algebraically cone metric space has a topology.
Cone bounded
Equivalent cone norms
Algebraically cone metric.
2014
5
01
71
80
http://ijmsi.ir/article-1-360-en.pdf
10.7508/ijmsi.2014.01.007
17-575
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
On Hyperideal Structure of Ternary Semihypergroups
Kostaq
Hila
kostaq_hila@yahoo.com
Bijan
Davvaz
davvaz@yazd.ac.ir
Krisanthi
Naka
khila@uogj.edu.al
In this paper, we introduce and study the concepts of prime left, semiprime left and irreducible left hyperideals in ternary semihyper- groups and investigate some basic properties of them. We introduce the concepts of hyper lter and hypersemilattice congruence of ternary semi- hypergroups. We give some characterizations of hyper lters in ternary semihypergroups. Some relationships between hyper lters, prime hyper- ideals and hypersemilattice congruences in ternary semihypergroups are considered. We also introduce the notion of hyperideals extensions in ternary semihypergroups and some properties of them are investigated.
Semihypergroup
Ternary semihypergroup
Hyperideal
Prime left hyperideal
Semiprime left hyperideal
Irreducible left hyperideal
Hyper lter
Left m-system
Left i-system
Left p-system.
2014
5
01
81
98
http://ijmsi.ir/article-1-575-en.pdf
10.7508/ijmsi.2014.01.008
17-844
2019-10-16
10.1002
Iranian Journal of Mathematical Sciences and Informatics
IJMSI
1735-4463
2008-9473
7
2014
9
1
ABSTRACTS IN PERSIAN - Vol. 9, No. 1
Name of Authors
in This Volume
Please see the full text contains the Pesian abstracts for this volume.
2014
5
01
99
107
http://ijmsi.ir/article-1-844-en.pdf