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2014, Volume 17, Issue 1  


RESEARCH ARTICLE
Rigid, quasi-rigid and matrix rings with $(\overline{\sigma},0)$-multiplication
Cihat Abdioĝlu, Serap Şahinkaya, Arda KÖR
1
Equivalence of matrices over commutative rings
Vitaliy. M. Bondarenko, Alexander A. Tylyshchak, Myroslav V. Stoika
12
Non-contracting groups generated by (3,2)-automata
Nick Davis, Murray Elder, Lawrence Reeves
20
Algorithmic computation of principal posets using Maple and Python
Marcin Gąsiorek, Daniel Simson, Katarzyna Zając
33
Semiabelian and self-returning of points of $n$-ary groups
Yu. I. Kulazhenko
70
A Galois-Grothendieck-type correspondence for groupoid actions
Antonio Paques, Thaísa Tamusiunas
80
On the subset combinatorics of $G$-spaces
Igor Protasov, Sergii Slobodianiuk
98

SURVEY ARTICLE
Some combinatorial problems in the theory of partial transformation semigroups
A. Umar
110

RESEARCH ARTICLE
Chromatic number of graphs with special distance sets, I
Venkataraman Yegnanarayanan
135
Algebra and Discrete Mathematics
 
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