Volume 10 (2022-2023)
Volume 9 (2021-2022)
Volume 8 (2020-2021)
Volume 7 (2019-2020)
Volume 6 (2018-2019)
Volume 5 (2017-2018)
Volume 4 (2016-2017)
Volume 2 (2014-2015)
Volume 1 (2013-2014)
AMENABILITY OF VECTOR VALUED GROUP ALGEBRAS

Ali Ghaffari; Seyedeh Samaneh Javadi Syahkale

Volume 3, Issue 2 , January 2016, Pages 97-107

http://dx.doi.org/10.22044/jas.2015.610

Abstract
  The purpose of this article is to develop the notions of amenabilityfor vector valued group algebras. We prove that L1(G, A) is approximatelyweakly amenable where A is a unital separable Banach algebra. We givenecessary and sufficient conditions for the existence of a left invariant meanon L∞(G, ...  Read More

IDEALS IN EL-SEMIHYPERGROUPS ASSOCIATED TO ORDERED SEMIGROUPS

S. H. Ghazavi; S. M. Anvariyeh; S. Mirvakili

Volume 3, Issue 2 , January 2016, Pages 109-125

http://dx.doi.org/10.22044/jas.2015.611

Abstract
  In this paper, we attempt to investigate the connection between various types of ideals (for examples $(m, n)$-ideal, bi-ideal, interior ideal, quasi ideal, prime ideal and maximal ideal) of an ordered semigroup $(S,cdot ,leq)$ and the correspond hyperideals of its EL-hyperstructure $(S,*)$ (if exists). ...  Read More

ON ABSOLUTE CENTRAL AUTOMORPHISMS FIXING THE CENTER ELEMENTWISE

Z. Kaboutari Farimani; M. M. Nasrabadi

Volume 3, Issue 2 , January 2016, Pages 127-131

http://dx.doi.org/10.22044/jas.2015.612

Abstract
  Let G be a finite p-group and let Aut_l(G) be the group of absolute central automorphisms of G. In this paper we give necessary and sufficient condition on G such that each absolute central automorphism of G fixes the centre element-wise. Also we classify all groups of orders p^3 and p^4 whose absolute ...  Read More

ON GRADED LOCAL COHOMOLOGY MODULES DEFINED BY A PAIR OF IDEALS

M. Jahangiri; Z. Habibi

Volume 3, Issue 2 , January 2016, Pages 133-146

http://dx.doi.org/10.22044/jas.2015.613

Abstract
  Let $R = bigoplus_{n in mathbb{N}_{0}} R_{n}$ be a standardgraded ring, $M$ be a finitely generated graded $R$-module and $J$be a homogenous ideal of $R$. In this paper we study the gradedstructure of the $i$-th local cohomology module of $M$ defined by apair of ideals $(R_{+},J)$, i.e. $H^{i}_{R_{+},J}(M)$. ...  Read More

RESULTS ON ALMOST COHEN-MACAULAY MODULES

A. Mafi; S. Tabejamaat

Volume 3, Issue 2 , January 2016, Pages 147-150

http://dx.doi.org/10.22044/jas.2015.614

Abstract
  Let $(R,\underline{m})$ be a commutative Noetherian local ring and $M$ be a non-zero finitely generated $R$-module. We show that if $R$ is almost Cohen-Macaulay and $M$ is perfect with finite projective dimension, then $M$ is an almost Cohen-Macaulay module. Also, we give some necessary and sufficient ...  Read More

RATIONAL CHARACTER TABLE OF SOME FINITE GROUPS

H. Shabani; A. R. Ashrafi; M. Ghorbani

Volume 3, Issue 2 , January 2016, Pages 151-169

http://dx.doi.org/10.22044/jas.2015.615

Abstract
  The aim of this paper is to compute the rational character tables of the dicyclic group $T_{4n}$, the groups of order $pq$ and $pqr$. Some general properties of rational character tables are also considered into account.The aim of this paper is to compute the rational character tables of the dicyclic ...  Read More

MAGMA-JOINED-MAGMAS: A CLASS OF NEW ALGEBRAIC STRUCTURES

M. H. Hooshmand

Volume 3, Issue 2 , January 2016, Pages 171-199

http://dx.doi.org/10.22044/jas.2015.616

Abstract
  By left magma-$e$-magma, I mean a set containingthe fixed element $e$, and equipped by two binary operations "$cdot$", $odot$ with the property $eodot (xcdot y)=eodot(xodot y)$, namelyleft $e$-join law. So, $(X,cdot,e,odot)$ is a left magma-$e$-magmaif and only if $(X,cdot)$, $(X,odot)$ are magmas (groupoids), ...  Read More

NONNIL-NOETHERIAN MODULES OVER COMMUTATIVE RINGS

A. Yousefian Darani

Volume 3, Issue 2 , January 2016, Pages 201-210

http://dx.doi.org/10.22044/jas.2015.618

Abstract
  In this paper we introduce a new class of modules which is closely related to the class of Noetherian modules. Let $R$ be a commutative ring with identity and let $M$ be an $R$-module such that $Nil(M)$ is a divided prime submodule of $M$. $M$ is called a Nonnil-Noetherian $R$-module if every nonnil ...  Read More

A SHORT PROOF OF A RESULT OF NAGEL

N. Shirmohammadi

Volume 3, Issue 2 , January 2016, Pages 211-215

http://dx.doi.org/10.22044/jas.2015.619

Abstract
  Let $(R,fm)$ be a Gorenstein local ring and$M,N$ be two finitely generated modules over $R$. Nagel proved that if $M$ and $N$ are inthe same even liaison class, thenone has $H^i_{fm}(M)cong H^i_{fm}(N)$ for all $iIn this paper, we provide a short proof to this result.  Read More

ON THE VANISHING OF DERIVED LOCAL HOMOLOGY MODULES

M. Hatamkhani

Volume 3, Issue 2 , January 2016, Pages 217-225

http://dx.doi.org/10.22044/jas.2015.620

Abstract
  Let $R$ be a commutative Noetherian ring, $fa$ anideal of $R$ and $mathcal{D}(R)$ denote the derived category of$R$-modules. For any homologically bounded complex $X$, we conjecture that$sup {bf L}Lambda^{fa}(X)leq$ mag$_RX$. We prove thisin several cases. This generalize the main result of Hatamkhani ...  Read More