Article

30 September 2020

Variants of Essential Arity for Partial Functions

Erkko Lehtonen*, Nareupanat Lekkoksung

Kyungpook Mathematical Journal 2020; 60: 423-443

Generalizations of essential arity of partial functions, based on essential sets of arguments, are introduced, and their interplay with the minor relation of functions is investigated.

Key Words:

partial function, essential argument, essential set of arguments

Article

30 September 2020

ϕ-prime Subsemimodules of Semimodules over Commutative Semirings

Fatemeh Fatahi and Reza Safakish*

Kyungpook Mathematical Journal 2020; 60: 445-453

Let R be a commutative semiring with identity and M be a unitary R-semimodule. Let be a function, where

Key Words:

prime subsemimodule, weakly prime subsemimodule, ϕ-prime subsemimodule

Article

30 September 2020

Purities of Ordered Ideals of Ordered Semirings

Pakorn Palakawong na Ayutthaya, Bundit Pibaljommee*

Kyungpook Mathematical Journal 2020; 60: 455-465

We introduce the concepts of the left purity, right purity, quasi-purity, bipurity, left weak purity and right weak purity of ordered ideals of ordered semirings and use them to characterize regular ordered semirings, left weakly regular ordered s...

Key Words:

pure ordered ideal, ordered semiring, regular ordered semiring

Article

30 September 2020

On Diameter, Cyclomatic Number and Inverse Degree of Chemical Graphs

Reza Sharafdini*, Ali Ghalavand and Ali Reza Ashrafi

Kyungpook Mathematical Journal 2020; 60: 467-475

Let G be a chemical graph with vertex set {v1, v1, … , vn} and degree sequence d(G) = (...

Key Words:

diameter, cyclomatic number, pendant vertex, inverse degree, chemical graph

Article

30 September 2020

On the Fekete-SzegÖ Problem for Starlike Functions of Complex Order

Hanan Darwish and Abdel-Moniem Lashin, Bashar Al Saeedi*

Kyungpook Mathematical Journal 2020; 60: 477-484

For a non-zero complex number b and for m and n in let Ψn,m(b) denote the cl...

Key Words:

coefficient estimates, Salagean operator, Fekete Szego problem, starlike functions of complex order

Article

30 September 2020

Extreme Points, Exposed Points and Smooth Points of the Space LS

Sung Guen Kim

Kyungpook Mathematical Journal 2020; 60: 485-505

We present a complete description of all the extreme points of the unit ball of Ls

Key Words:

symmetric bilinear forms on ℝ³ with the supremum norm, extreme points, exposed points, smooth points.

Article

30 September 2020

Applications of the Schwarz Lemma and Jack's Lemma for the Holomorphic Functions

Bülent Nafi Örnek*, Batuhan Çatal

Kyungpook Mathematical Journal 2020; 60: 507-518

We consider a boundary version of the Schwarz Lemma on a certain class of functions which is denoted by . For the function f(z) = z

Key Words:

holomorphic function, the Schwarz lemma on the boundary, Jack's lemma, angular derivative.

Article

Kyungpook Mathematical Journal 2020; 60(3): 423-443

Variants of Essential Arity for Partial Functions

Erkko Lehtonen*, Nareupanat Lekkoksung

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(3): 445-453

ϕ-prime Subsemimodules of Semimodules over Commutative Semirings

Fatemeh Fatahi and Reza Safakish*

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(3): 455-465

Purities of Ordered Ideals of Ordered Semirings

Pakorn Palakawong na Ayutthaya, Bundit Pibaljommee*

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(3): 467-475

On Diameter, Cyclomatic Number and Inverse Degree of Chemical Graphs

Reza Sharafdini*, Ali Ghalavand and Ali Reza Ashrafi

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(3): 477-484

On the Fekete-SzegÖ Problem for Starlike Functions of Complex Order

Hanan Darwish and Abdel-Moniem Lashin, Bashar Al Saeedi*

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(3): 485-505

Extreme Points, Exposed Points and Smooth Points of the Space

Sung Guen Kim

Full Text PDF Bibtex Google Scholar

Published online July 14, 2020

Submanifolds of Sasaki-like Almost Contact Manifolds with B-metric

Anu Devgan and Rakesh Kumar Nagaich

Full Text PDF Bibtex Google Scholar
Published online July 14, 2020

Extreme Points, Exposed Points and Smooth Points of the Space

Sung Guen Kim

Full Text PDF Bibtex Google Scholar

Article

Kyungpook Mathematical Journal 2020; 60(1): 1-20

On the Representations of Finite Distributive Lattices

Mark Siggers

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(1): 73-116

Fractional-Order Derivatives and Integrals: Introductory Overview and Recent Developments

Hari Mohan Srivastava

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(2): 223-238

Lightlike Hypersurfaces of an Indeﬁnite Nearly Trans-Sasakian Manifold with an (ℓ,...

Chul Woo Lee, Jae Won Lee∗

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(1): 53-69

Where Some Inert Minimal Ring Extensions of a Commutative Ring Come from

David Earl Dobbs

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(1): 21-43

The Leavitt Path Algebras of Ultragraphs

Mostafa Imanfar and Abdolrasoul Pourabbas∗, Hossein Larki

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(1): 211-222

On Some Fractional Quadratic Integral Inequalities

Ahmed M. A. El-Sayed, Hind H. G. Hashem∗

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(1): 71-72

Quasi-reversibility of the Ring of 2×2 Matrices over an Arbitrary Field

Dariush Heidari∗, Bijan Davvaz

Full Text PDF Bibtex Google Scholar
Article

Kyungpook Mathematical Journal 2020; 60(1): 44-51

On Generalized FI-extending Modules

Canan Celep Yücel

Full Text PDF Bibtex Google Scholar