期刊： SEMIGROUP FORUM, 2021; 102 (3)
In 2001, Enochs' celebrated flat cover conjecture was finally proven, and the proofs have since generated a great deal of interest among researchers. ......
期刊： SEMIGROUP FORUM, 2021; 103 (2)
Closure systems (spaces) play an important role in characterizing certain ordered structures. In this paper, FinSet-bounded algebraic closure spaces a......
期刊： SEMIGROUP FORUM, 2021; 103 (1)
The variety generated by the Brandt semigroup B-2 can be defined within the variety generated by the semigroup A(2) by the single identity x(2) y(2) a......
期刊： SEMIGROUP FORUM, 2021; 103 (2)
We analyze the convergence of the following type of series T-N f(n) = Sigma(N2)(j=N1) v(j)(e(aj+1 Delta d) f(n) - e(aj Delta d) f(n)), n is an element......
We give a construction of the free digroup on a set X and describe the halo and the group parts of it. We prove that the free digroup on X is isomorph......
We introduce the concepts of S-sets and Q-sets for a flow (a group action on a compact metric space) and prove that a transitive flow is sensitive if ......
In this paper, two main results on the uniform stability of a resolvent family {R-h (t)}(t >= 0), depending on a parameter It are presented. First,......
期刊： SEMIGROUP FORUM, 2021; 102 (2)
By using the method of functional analysis, especially C-0-semigroup theory and spectral theory of linear operators we prove the well-posedness and th......
期刊： SEMIGROUP FORUM, 2020; 101 (3)
In this paper, by means of congruence openings of multiplicative Green's relations on a semiring we define and study several varieties of semirings, o......
期刊： SEMIGROUP FORUM, 2020; 101 (2)
This study aims to investigate the Zariski topology on the prime ideals of a commutative semigroupS, denoted bySpec(S). First, we show that a topologi......
期刊： SEMIGROUP FORUM, 2020; 101 (3)
A congruence on an inverse semigroupSis determined uniquely by its kernel and trace. Denoting by rho(k) and rho(t) the least congruence onShaving the ......
期刊： SEMIGROUP FORUM, 2020; 101 (3)
In this paper, we study the F-transitive behaviour of the translation semigroups on complex sectors, where F is a Furstenberg family of the semigroup.......
期刊： SEMIGROUP FORUM, 2020; 101 (3)
We consider the semidiscrete approximation of the Cauchy problem (D(t)(alpha)u)(t)=Au(t)+f(t,u(t)), t is an element of (0,T], u(0) = u(0) ,0 < alph......
期刊： SEMIGROUP FORUM, 2020; 100 (3)
We consider the sensitivity from a topological point of view. We show that a continuous, topologically transitive and non-minimal action of a monoid S......
