Journal of the Chungcheong Mathematical Society

CONTENTS

Characterizations of Pareto, Weibull and power function distributions based on generalized order statistics Mohammad Ahsanullah and G.G. Hamedani	385
Almost open and almost homeomorphisms Gui Seok Kim and Kyung Bok Lee	397
Unique point of coincidence for two mappings with $\varphi$- or $\psi$-$\phi$-contractive conditions on 2-metric spaces Ming-Xing Xu, Xin Huang, and Yong-Jie Piao	417
Uniformly Lipschitz stability and asymptotic behavior of perturbed differential systems Sang Il Choi and Yoon Hoe Goo	429
Symmetric bi-$f$-multipliers of incline algebras Kyung Ho Kim and Yong Hoon Lee	443
A fixed point approach to stability of additive functional inequalities in fuzzy normed spaces Chang Il Kim and Se Won Park	453
Optimality and duality for nondifferentiable fractional programming with generalized invexity Gwi Soo Kim and Moon Hee Kim	465
The complete moment convergence for weighted sums of stochastically dominated PNQD random variables Hyun-Chull Kim	477
Symmetric bi-$(f, g)$-derivations in lattices Kyung Ho Kim and Yong Hoon Lee	491
Comparison of numerical methods for option pricing under the CGMY model Ahram Lee and Younhee Lee	503
Study on the arithmetic of modular forms SoYoung Choi	509
On exact solutions for impulsive differential equations with non-integer orders Sung Kyu Choi and Namjip Koo	515