Volume 5, Issue 1

 

ارسال های اخیر

  • Abstracts in Persian, Vol. 5, No. 1 

    پدیدآور نامشخص (Shahid Beheshti University, 2016-07-01)

  • Realization of locally extended affine Lie algebras of type $A_1$ 

    Behboodi, Gholamreza (Shahid Beheshti University, 2016-07-01)
    Locally extended affine Lie algebras were introduced by Morita and Yoshii in [J. Algebra 301(1) (2006), 59-81] as a natural generalization of extended affine Lie algebras. After that, various generalizations of these Lie ...

  • Properties of products for flatness in the category of $S$-posets 

    Khosravi, Roghaieh؛ Sedaghatjoo, Mojtaba (Shahid Beheshti University, 2016-07-01)
    This paper is devoted to the study of products of classes of right $S$-posets possessing one of the flatness properties and preservation of such properties under products. Specifically, we characterize a pomonoid $S$ over ...

  • On descent for coalgebras and type transformations 

    Kianpi, Maurice (Shahid Beheshti University, 2016-07-01)
    We find a criterion for a morphism of coalgebras over a Barr-exact category to be effective descent and determine (effective) descent morphisms for coalgebras over toposes in some cases. Also, we study some exactness ...

  • The ring of real-valued functions on a frame 

    Karimi Feizabadi, Abolghasem؛ Estaji, Ali Akbar؛ Zarghani, Mohammad (Shahid Beheshti University, 2016-07-01)
    In this paper, we define and study the notion of the real-valued functions on a frame $L$. We show that $F(L) $, consisting of all frame homomorphisms from the power set of $mathbb{R}$ to a frame $ L$, is an $f$-ring, as ...

  • On Condition (G-PWP) 

    Arabtash, Mostafa؛ Golchin, Akbar؛ Mohammadzadeh Saany, Hossein (Shahid Beheshti University, 2016-07-01)
    Laan in (Ph.D Thesis, Tartu. 1999) introduced the principal weak form of Condition $(P)$ as Condition $(PWP)$ and gave some characterization of monoids by this condition of their acts. In this paper first we introduce ...

  • A History of Selected Topics in Categorical Algebra I: From Galois Theory to Abstract Commutators and Internal Groupoids 

    Janelidze, George (Shahid Beheshti University, 2016-07-01)
    This paper is a chronological survey, with no proofs, of a direction in categorical algebra, which is based on categorical Galois theory and involves generalized central extensions, commutators, and internal groupoids in ...

  • Cover for Vol. 5, No.1 

    پدیدآور نامشخص (Shahid Beheshti University, 2016-07-01)