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JMB Journal of Microbiolog and Biotechnology

OPEN ACCESS eISSN 0454-8124
pISSN 1225-6951
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Article
30 June 2022

ZPI Property In Amalgamated Duplication Ring

Ahmed Hamed and Achraf Malek

Kyungpook Mathematical Journal 2022; 62: 205-211

Let A be a commutative ring. We say that A is a ZPI ring if every proper ideal of A is a finite product of prime ideals [5]. In this paper, we study when the a...
Key Words:

ZPI ring, Amalgamated duplication ring, Dedekind domain

Article
30 June 2022

The Relation Between Units and Nilpotents

Jeoung Soo Cheon, Tai Keun Kwak, Yang Lee et al.

Kyungpook Mathematical Journal 2022; 62: 213-227

We discuss the relation between units and nilpotents of a ring, concentrating on the transitivity of units on nilpotents under regular group actions. We first prove that for a ring R, if U(R) is right transitive on
Key Words:

transitivity of units, right UN-transitive ring, unilpotent-IFP ring, unit, nilpotent, nilradical, NI ring

Article
30 June 2022

Uniformly Close-to-Convex Functions with Respect to Conjugate Points

Syed Zakar Hussain Bukhari∗, Taimoor Salahuddin, Imtiaz Ahmad and Muhammad Ishaq et al.

Kyungpook Mathematical Journal 2022; 62: 229-242

In this paper, we introduce a new subclass of k-uniformly close-to-convex functions with respect to conjugate points. We study characterization, coefficient estimates, distortion bounds, extreme points and radii problems for this cla...
Key Words:

Characterizations, coefficients estimates, distortion bounds, extreme points, radii problems

Article
30 June 2022

Bohr’s Phenomenon for Some Univalent Harmonic Functions

Chinu Singla∗, Sushma Gupta and Sukhjit Singh

Kyungpook Mathematical Journal 2022; 62: 243-256

In 1914, Bohr proved that there is an r0∈(0,
Key Words:

Bohr radius, harmonic univalent functions, convex in one direction

Article
30 June 2022

Coefficient Estimates for a Subclass of Bi-univalent Functions Associated with Symmetric q-derivative Operator by Means of the Gegenbauer Polynomials

Ala Amourah, Basem Aref Frasin, Tariq Al-Hawary

Kyungpook Mathematical Journal 2022; 62: 257-269

In the present paper, a subclass of analytic and bi-univalent functions is defined using a symmetric q-derivative operator by means of Gegenbauer polynomials. Coefficients bounds for functions belonging to this subclass are obtained....
Key Words:

Gegenbauer polynomials, bi-univalent functions, analytic functions, Fekete-Szegö problem

Article
30 June 2022

A New Geometric Constant in Banach Spaces Related to the Isosceles Orthogonality

Zhijian Yang and Yongjin Li

Kyungpook Mathematical Journal 2022; 62: 271-287

In this paper, starting with the geometric constants that can characterize Hilbert spaces, combined with the isosceles orthogonality of Banach spaces, the orthogonal geometric constant
Key Words:

Banach spaces, isosceles orthogonality, geometric constants, geometric properties

Article
30 June 2022

A Study of Broline-Crowe-Isaacs Matrices of Polygon Dissections

Raùl Felipe

Kyungpook Mathematical Journal 2022; 62: 289-321

The work realized by the authors of [4], [5] and [6] associates a non-negative matrix with positive integers entries to each disse...
Key Words:

BCL-matrices, non-negative matrix

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