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Kyungpook mathematical journal
Journal Basic Information
pISSN :
1225-6951
eISSN :
0454-8124
Journal DOI :
10.5666/KMJ
Frequency :
Others
Publisher:
Department of Mathematics, Kyungpook National University
Editor in Chief :
Sang-Dong Kim
Volume & Issues
Volume 43, Issue 2 - 00 2003
Volume 43, Issue 1 - 00 2003
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1
A Note on Strongly Euclidean Semiring
P. MUKHOPADHYAY ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 163~163
Abstract
Structure of ideals in an Euclidean semiring has been studied by Dale L. and Hanson D. L. [1] (1977). Mukhopadhyay in his paper [4] (1999) raised the question "Is every Euclidean semiring a principal k-ideal semiring ?" An answer to thie to this question in the case of inversive semirings is provided in the present paper.
2
Positive Interpolation on Ax = y in CSL-algebra AlgL
강주호 ; 조영수 ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 169~169
Abstract
Given vectors x and y in a Hilbert space, an interpolating operator is a bounded operator T such that Tx = y. An interpolating operator for n vectors satisfies the equation T
=
, for i = 1,2 ···, n. In this article, we obtained the following : Let H be a Hilbert space and L be a commutative subspace lattice on H. Let x and y be vectors in H. Then the following statements are equivalent. (1) There exists an operator A in AlgL such that Ax - y, A is positive nad every E in L reduces A. (2) sup{}
3
Limit Distribution for Sums of the Reciprocals of Sine of Random Variables
K. NEAMMANEE ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 175~175
Abstract
Let (
) be a sequence of independent continuous random variables such that sin
≠ 0 for every n. In this paper, we give conditions that the sequence of distribution functions of the reciprocals of sin
weakly converges to a limit.
4
Some Geometric Properties of Cesaro Sequence Space
W. SANHAN ; S. SUANTAI ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 191~191
Abstract
In this paper we define a modular on the Cesaro sequence sapce ces(p) and consider it equipped with the Luxemburg norm. We give some relationships between the modular and the Luxemburg norm on this space and show that the space ces(P) has property (H) but it is not rotund (R), where p = (
) is a bounded sequence of positive real number with
≥ 1 for all k ∈ N.
5
On a Class of p-valent Analytic Functions with Complex Order
JAGANNATH PATEL ; AKSHAYA KUMAR MOHANTY ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 199~199
Abstract
In the present paper, the authors introduce a general class
(A, B, p) of p-valent analytic functions in the open unit disk. A sufficient condition, coefficient inequalities, distortion theorems and Hadamard product (or convolution) properties of functions belonging to this class are obtained.
6
Some Applications of Certain Integral Operator
JIN LIN LIU ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 211~211
Abstract
In this paper we introduce and study some new subclasses of starlike, convex, close-to-convex and quasi-convex functions defined by certain integral operator. Inclusion relations are established and integral operator of functions in these subclasses is discussed.
7
Second Method of Lyapunov for Existence of Almost Periodic Solutions for Impulsive Integro-Differential Equations
GANI TR. STAMOV ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 221~221
Abstract
In the present paper sufficient conditions for the existence of almost periodic solutions of impulsive integro-differential equations are obtained. The investigations are carried out by means piecewise continuous functions which are generalizations of the classical Lyapunov functions and the comparison principle.
8
Transnormal Functions on
and
박광성 ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 233~233
Abstract
In this paper, we study on transnormal systems on the Euclidean and semi-Euclidean spaces. We prove that there is a one-to-one correspondence between some transnormal functions of
and
.
9
Some BQ-semigroups of Linear Transformations
CHAIWAT NAMNAK ; YUPAPORN KEMPRASIT ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 237~237
Abstract
A BQ-semigroups is a semigroup whose sets of bi-ideals and quasi-ideals coincide. In this paper, some linear transformations semigroups on a vector space V over a division ring are characterized in terms of dimV when they are BQ-semigroup.
10
Ricci Tensor in 3-dimensional Trans-Sasakian manifolds
U. C. DE ; MUKUT MANI TRIPATHI ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 247~247
Abstract
In a 3-dimensional trans-Sasakian manifold, explicit formulae for Ricci operator, Ricci tensor and curvature tensor are obtained. In particular, expressions for Ricci tensor are obtained in a 3-dimensional trans-Sasakian manifold in cases of the manifold being η-Einstein or satisfying R (X, Y) · S = 0.
11
A Constructive View of Complete Regularity
BERNHARA BANASCHEWSKI ; ALES PULTR ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 257~257
Abstract
This note introduced the largest interpolative relation contained in the rather below(= well inside) relation in a frame as a constructive version of the familiar completely below (= really inside) relation. It establishes severla constructively valid results for this whose analogues for the latter are only proved by means of the Axiom of Countable Dependent Choice.
12
Oscillation Criteria for a Class of Parabolic Equations with Functional Arguments
YUTAKA SHOUKAKU ; KUSUO KOBAYASHI ; NORIO YOSHIDA ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 263~263
Abstract
Parabolic equations with functional arguments are studied, and sufficient conditions are obtained for the oscillation of solutions of nonlinear parabolic equations. Our approach is to reduce the multi-dimensional problem to a one-dimensional problem for sublinear functional differential inequalities.
13
The Condition under Which a Pre-logic Becomes an Implication Algebra
IVAN CHAJDA ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 273~273
Abstract
We show that a pre-logic which is a generalization of propositional intuitionistic logic becomes an implication algebra if and only if it satisfies the quasi-commutativity.
14
The Category of p-semisimple BCI-algebra
S. M. A. ZAIDI ; SHABBIR KHAN ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 279~279
Abstract
In 1985, Tiande and Chang introduced the concept of p-semisimple BCI-algebras. In this paper, we analyze properties of p-semisimple BCI-algebras through categorical methods. We observe that the category of p-semisimple BCI-algebras is a very nice category which is regular, normal, balanced, complete, abelian and equivalent to the category
of abelian groups.
15
Endomorphism Rings of Finite Length Injective Modules
R. N. GUPTA ; DINESH KHURANA ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 293~293
Abstract
We prove the existence of a finite length injective right module whose endomorphism ring is not right Artinian.
16
A Note on the Confidence Region for the Bivariate Co-ordinate-wise Quantiles for Bivariate Data
H. M. BARAKAT ; M. A. EL-SHANDIDY ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 299~299
Abstract
In this paper we established a family of nonparametric recurrence relations satisfied by the confidence coefficient of the confidence region for the bivariate co-ordinate-wise quantiles for bivariate data.
17
On Lorentzian Almost Paracontact Manifolds with a Structure of the Concircular Type
ABSOS ALI SHAIKH ;
Kyungpook mathematical journal, volume 43, issue 2, 2003, Pages 305~305
Abstract
This paper presents a study of Lorentzian almost paracontact manifolds with a structure of the concircular type.