17 citations · 55 across the 19 of their papers we have counts for
9 papers · 1 filter
A Periodic Solution to Impulsive Logistic Equation
Gyong-Chol Kim, Hyong-Chol O, Sang-Mun Kim +1
In this paper is provided a new representation of periodic solution to the impulsive Logistic equation considered in [7].
Conditions for Bifurcations in a Non-Autonomous Scalar Differential Equation
Sang-Mun Kim, Hyong-Chol O
In this paper are provided some sufficient conditions for a non autonomous scalar differential equation to have saddle node, transcritical and pitchfork bifurcations using higher o…
Comprehensive Unified Models of Structural and Reduced Form Models for Defaultable Fixed Income Bonds (Part 1: One factor-model, Part 2:Two factors-model)
Hyong-Chol O, Song-Yon Kim, Dong-Hyok Kim +1
Pricing formulae for defaultable corporate bonds with discrete coupons under consideration of the government taxes in the united model of structural and reduced form models are pro…
Construction of Recurrent Fractal Interpolation Surfaces with Function Scaling Factors and Estimation of Box-counting Dimension on Rectangular Grids
Chol-Hui Yun, Hui-Chol Choi, Hyong-Chol O
We consider a construction of recurrent fractal interpolation surfaces with function vertical scaling factors and estimation of their box-counting dimension. A recurrent fractal in…
Representation of Solutions of Linear Homogeneous Caputo Fractional Differential Equations with Continuous Variable Coefficients
Sun-Ae Pak, Myong-Ha Kim, Hyong-Chol O
We consider the canonical fundamental systems of solutions of linear homogeneous Caputo fractional differential equations with continuous variable coefficients. Here we gained a se…
An Efficient Bilinear Pairing-Free Certificateless Two-Party Authenticated Key Agreement Protocol in the eCK Model
Yong-Jin Kim, Yong-Min Kim, Yong-Jin Choe +1
Recent study on certificateless authenticated key agreement focuses on bilinear pairing-free certificateless authenticated key agreement protocol. Yet it has got limitations in the…
Construction of Fractal Surfaces by Recurrent Fractal Interpolation Curves
Chol-hui Yun, Hyong-chol O., Hui-chol Choi
A method to construct fractal surfaces by recurrent fractal curves is provided. First we construct fractal interpolation curves using a recurrent iterated functions system(RIFS) wi…
The Pricing of Multiple-Expiry Exotics
Hyong-Chol O, Mun-Chol KiM
In this paper we extend Buchen's method to develop a new technique for pricing of some exotic options with several expiry dates(more than 3 expiry dates) using a concept of higher…
Existence and Solution-representation of IVP for LFDE with Generalized Riemann-Liouville fractional derivatives and terms
Myong-Ha Kim, Guk-Chol Ri, Hyong-Chol O
This paper provides the existence and representation of solution to an initial value problem for the general multi-term linear fractional differential equation with generalized Rie…