Volume 2, Issue 2

 

ارسال های اخیر

  • $z^circ$-filters and related ideals in $C(X)$ 

    Mohamadian, Rostam (Yazd University, 2015-11-01)
    In this article we introduce the concept of $z^circ$-filter on a topological space $X$. We study and investigate the behavior of $z^circ$-filters and compare them  with corresponding ideals, namely, $z^circ$-ideals of ...

  • On the nil-clean matrix over a UFD 

    Hadjirezaei, Somayeh؛ Karimzadeh, Somayeh (Yazd University, 2015-11-01)
    In this paper we characterize all $2times 2$ idempotent and nilpotent matrices over an integral domain and then we characterize all $2times 2$ strongly nil-clean matrices over a PID. Also, we determine when a $2times 2$ ...

  • Ultra and Involution Ideals in $BCK$-algebras 

    Saidi Goraghani, Simin؛ Borzooei, R. A. (Yazd University, 2015-11-01)
    In this paper, we define the notions of ultra and involution ideals in $BCK$-algebras. Then we get the relation among them and other ideals as (positive) implicative, associative, commutative and prime ideals. Specially, ...

  • When does the complement of the annihilating-ideal graph of a commutative ring admit a cut vertex? 

    VISWESWARAN, S.؛ PARMAR, A. (Yazd University, 2015-11-01)
    The rings considered in this article are  commutative  with identity which admit at least two  nonzero annihilating ideals. Let $R$ be a ring. Let $mathbb{A}(R)$ denote the set of all annihilating ideals of $R$ and let ...

  • Characterization and axiomatization of all semigroups whose square is group 

    Hooshmand, M.H. (Yazd University, 2015-11-01)
    In this paper we give a characterization for all semigroups whose square is a group. Moreover, we axiomatize such semigroups and study some relations between the class of these semigroups and Grouplikes,introduced ...