Journal of the Chungcheong Mathematical Society

CONTENTS

A NOTE ON A HYPERGEOMETRIC SERIES BASED SOLUTION TO THE BASEL PROBLEM Arjun Kumar Rathie and Dongkyu Lim	1
SPECTRUM OF LINE ARRANGEMENTS WITH MULTIPLICITIES: A COMBINATORIAL APPROACH VIA LATTICE POINT ENUMERATION Youngho Yoon	9
ENERGY DECAY OF SOLUTIONS FOR THE VISCOELASTIC NONLINEAR EQUATION WITH A INTERNAL TIME-VARYING DELAY TERM AND BOUNDARIES RELATING THE KIRCHHOFF TYPE COEFFICIENT Daewook Kim	25
A GENERAL TYPE OF EXPANSIVE DIFFEOMORPHISMS Manseob Lee	45
CONTINUITY OF INTERTWINING LINEAR OPERATORS WITH SHIFT OPERATORS ON L (R) Hyuk Han	53
PRICING OPTIONS ON VOLATILITY OF VOLATILITY MODEL BASED ON HESTONS STOCHASTIC VOLATILITY WITH CREDIT RISK Min-Ku Lee	63