Hongik University

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19942026

most citedEstimation of Dynamic Panel Threshold Model using Stata

352 citations

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math.FA2015

On the stability of the linear functional equation in a single variable on complete metric groups

Soon-Mo Jung, Dorian Popa, Michael Th. Rassias

In this paper we obtain a result on Hyers-Ulam stability of the linear functional equation in a single variable $f (φ (x)) = g (x) \cdot f (x)$ on a complete metric group.

math.FA2011★ 12 cited

Approximately Quadratic Mappings on Restricted Domains

Abbas Najati And Soon-Mo Jung

In this paper, we introduce a generalized quadratic functional equation $f (r x + sy) = r f (x) + s f (y) - r s f (x - y)$ where $r, s$ are nonzero real numbers with $r + s = 1.$ We show th…

math.FA2005

Superstability of the generalized orthogonality equation on restricted domains

Soon-Mo Jung, Prasanna K Sahoo

Chmieliński has proved in the paper [4] the superstability of the generalized orthogonality equation $∣ < f (x), f (y) > ∣ = ∣ < x, y > ∣$ . In this paper, we will extend the result of Ch…