ORIGINAL_ARTICLE
Some notes on the characterization of two dimensional skew cyclic codes
A natural generalization of two dimensional cyclic code ($\T{TDC}$) is two dimensional skew cyclic code. It is well-known that there is a correspondence between two dimensional skew cyclic codes and left ideals of the quotient ring $R_n:=\F[x,y;\rho,\theta]/_l$. In this paper we characterize the left ideals of the ring $R_n$ with two methods and find the generator matrix for two dimensional skew cyclic codes.
http://jart.guilan.ac.ir/article_2002_7fb571bf92863d300628e203515796fa.pdf
2016-12-01T11:23:20
2018-10-22T11:23:20
1
8
Cyclic code
two dimensional skew cyclic code
generator matrix
Z.
Sepasdar
zahra.sepasdar@gmail.com
true
1
Ferdowsi university of Mashhad
Ferdowsi university of Mashhad
Ferdowsi university of Mashhad
LEAD_AUTHOR
ORIGINAL_ARTICLE
Weakly irreducible ideals
Let $R$ be a commutative ring. The purpose of this article is to introduce a new class of ideals of R called weakly irreducible ideals. This class could be a generalization of the families quasi-primary ideals and strongly irreducible ideals. The relationships between the notions primary, quasi-primary, weakly irreducible, strongly irreducible and irreducible ideals, in different rings, has been given. Also the relations between weakly irreducible ideals of $R$ and weakly irreducible ideals of localizations of the ring $R$ are also studied.
http://jart.guilan.ac.ir/article_2001_9216f3d6632631978bd0157cd816db85.pdf
2016-12-01T11:23:20
2018-10-22T11:23:20
9
17
Weakly irreducible ideal
quasi-primary ideal
strongly irreducible ideal
M.
Samiei
m.samiei91@yahoo.com
true
1
Department of Mathematics, Velayat University, Iranshahr, Iran.
Department of Mathematics, Velayat University, Iranshahr, Iran.
Department of Mathematics, Velayat University, Iranshahr, Iran.
LEAD_AUTHOR
H.
Fazaeli Moghimi
hfazaeli@birjand.ac.ir
true
2
Department of Mathematics, University of Birjand, Birjand, Iran.
Department of Mathematics, University of Birjand, Birjand, Iran.
Department of Mathematics, University of Birjand, Birjand, Iran.
AUTHOR
ORIGINAL_ARTICLE
On two generalizations of semi-projective modules: SGQ-projective and $pi$-semi-projective
Let $R$ be a ring and $M$ a right $R$-module with $S=End_R(M)$. A module $M$ is called semi-projective if for any epimorphism $f:M\rightarrow N$, where $N$ is a submodule of $M$, and for any homomorphism $g: M\rightarrow N$, there exists $h:M\rightarrow M$ such that $fh=g$. In this paper, we study SGQ-projective and $\pi$-semi-projective modules as two generalizations of semi-projective modules. A module $M$ is called an SGQ-projective module if for any $\phi\in S$, there exists a right ideal $X_\phi$ of $S$ such that $D_S(\Im \phi)=\phi S\oplus X_\phi$ as right $S$-modules. We call $M$ a $\pi$-semi-projective module if for any $0\neq s\in S$, there exists a positive integer $n$ such that $s^n\neq 0$ and any $R$-homomorphism from $M$ to $s^nM$ can be extended to an endomorphism of $M$. Some properties of this class of modules are investigated.
http://jart.guilan.ac.ir/article_1999_2bbc92f04935d418d9d7455095e55e83.pdf
2016-12-01T11:23:20
2018-10-22T11:23:20
19
29
Semi-projective module
SGQ-projective module
$pi$-Semi-projective
Coretractable module
Endomorphism ring
T.
Amouzegar
t.amoozegar@yahoo.com
true
1
Quchan university of Advanced Technology
Quchan university of Advanced Technology
Quchan university of Advanced Technology
LEAD_AUTHOR
ORIGINAL_ARTICLE
The universal $\mathcal{AIR}$- compactification of a semigroup
In this paper we establish a characterization of abelian compact Hausdorff semigroups with unique idempotent and ideal retraction property. We also introduce a function algebra on a semitopological semigroup whose associated semigroup compactification is universal withrespect to these properties.
http://jart.guilan.ac.ir/article_2000_7d9dcf6b892e84c4d861076a1b649e06.pdf
2016-12-01T11:23:20
2018-10-22T11:23:20
31
39
Semitopological semigroup
(universal) semigroup compactification
distal function
weakly almost periodic function
ideal retraction property
A.
Sahleh
sahlehj@guilan.ac.ir
true
1
University of Guilan
University of Guilan
University of Guilan
LEAD_AUTHOR
L.
Najarpisheh
najarpisheh@gmail.com
true
2
University of Guilan
University of Guilan
University of Guilan
AUTHOR
ORIGINAL_ARTICLE
I-prime ideals
In this paper, we introduce a new generalization of weakly prime ideals called $I$-prime. Suppose $R$ is a commutative ring with identity and $I$ a fixed ideal of $R$. A proper ideal $P$ of $R$ is $I$-prime if for $a, b \in R$ with $ab \in P-IP$ implies either $a \in P$ or $b \in P$. We give some characterizations of $I$-prime ideals and study some of its properties. Moreover, we give conditions under which $I$-prime ideals becomes prime or weakly prime and we construct the view of $I$-prime ideal in decomposite rings.
http://jart.guilan.ac.ir/article_1998_805b509c5392f49a246ca25b4fb110a2.pdf
2016-12-01T11:23:20
2018-10-22T11:23:20
41
47
prime ideal
weakly prime ideal
almost prime ideal
radical of the ideal
I.
Akray
ismaeelhmd@yahoo.com
true
1
Soran University
Soran University
Soran University
LEAD_AUTHOR
ORIGINAL_ARTICLE
2-D skew constacyclic codes over R[x, y; ρ, θ]
For a finite field $\mathbb{F}_q$, the bivariate skew polynomial ring $\mathbb{F}_q[x,y;\rho,\theta]$ has been used to study codes \cite{XH}. In this paper, we give some characterizations of the ring $R[x,y;\rho,\theta]$, where $R$ is a commutative ring. We investigate 2-D skew $(\lambda_1,\lambda_2)$-constacyclic codes in the ring $R[x,y;\rho,\theta]/\langle x^l-\lambda_1,y^s-\lambda_2\rangle_{\mathit{l}}.$ Also, the dual of 2-D skew $(\lambda_1,\lambda_2)$-constacyclic codes is investigated.
http://jart.guilan.ac.ir/article_1997_815df3ed319d9ed34d989ba776bacb95.pdf
2016-12-01T11:23:20
2018-10-22T11:23:20
49
63
Cyclic codes
Skew polynomial rings
2-D skew constacyclic codes
H.
Mostafanasab
h.mostafanasab@gmail.com
true
1
Eski Silahtaraga Elektrik Santrali, Kazim Karabekir, Istanbul Bilgi University
Eski Silahtaraga Elektrik Santrali, Kazim Karabekir, Istanbul Bilgi University
Eski Silahtaraga Elektrik Santrali, Kazim Karabekir, Istanbul Bilgi University
LEAD_AUTHOR