1 - 10 of 17 articles
Realization Theorems for Triangular Rings Triangular matrix rings which are endomorphism rings of Abelian groups are characterized and Abelian groups with (or without) triangular endomorphism rings are investigated.
Finite Groups Determined by an Inequality of the Orders of Their Normal Subgroups In this article we introduce and study a class of finite groups for which the orders of normal subgroups satisfy a certain inequality. It is closely connected to some well-known arithmetic classes of natural numbers.
On Homomorphisms of Krasner Hyperrings By a homomorphism from a Krasner hyperring ( A , +, ·) into a Krasner hyperring ( A ', +', ·') we mean a function ƒ: A → A ' satisfying ƒ( x + y ) ⊆ ƒ( x )+ ƒ( y ) and ƒ( x · y ) = ƒ( x ) ·' ƒ( y ) for all × , y ∈ A . The kernel of ƒ, ker ƒ, is defined by...
Some Ideals of Ternary Semigroups In this paper we characterize different types of ideals of ternary semigroup and study some interesting properties of these ideals of ternary semigroup.
On Approximate Solutions of Certain Mixed Type Integrodifferential Equations The aim of the present paper is to study approximate solutions of mixed Volterra-Fredholm type integrodifferential equations in one and two independent variables. The analysis used in the proofs is based on the...
Refinement of Hardy's Inequalities Involving Many Functions Via Superquadratic Functions Some new refined Hardy type integral inequalities involving n functions ( n ∈ Z + ) via superquadratic functions are established for p ≥ 2 and their dual inequalities are also derived. In particular, the...
On the Feedback Stabilization of Boussinesq Equations This paper provides feedback stabilization results, preserving the invariance of a given convex set, for the Boussinesq system, in 2D and 3D. The proofs use an existence theorem for weak solutions.
A Collocation Method for Direct Numerical Integration of Initial Value Problems in Higher Order Ordinary Differential Equations This paper concerns the solution of initial value problems (IVPs) in ordinary differential equations (ODEs) of orders higher than unity. The Chebyshev polynomials is...
On Generalized Absolute Cesàro Summability In this paper, a main theorem dealing with | C , 1 | k summability factors has been generalized under more weaker conditions for | C , α, β | k summability factors. This theorem also includes some new results.
Uniqueness of Entire Functions In this paper, we study the uniqueness problems on meromorphic functions sharing a finite set. The results extend and improve some theorems obtained earlier by Fang (2002) and Zhang-Lin (2008).
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