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龐錦成 카톨릭대학교 성심교정 1995 論文集 Vol.2 No.-
Let (??, G), n≥2. be a Riemannian manifold with Riemannian metric G. In this paper, we show that Sasaki g on the tangent bundle ?? is conformally flat if and only if (??, G) is flat, in which case (??, g) is flat.
Bang, Keumseong 가톨릭대학교 자연과학연구소 2004 자연과학논문집 Vol.25 No.-
We introduce a generalization of the concepts of "near" and "far" on the real numbers and investigate some properties of them.
A Study of contact metric manifolds with certain conditions on the characteristic vector field
Bang, Keumseong 가톨릭대학교 자연과학연구소 2003 자연과학논문집 Vol.24 No.-
We study contact metric structure whose characteristic vector is an eigenvector of the Ricci operator especially when the manifold is conformally flat.
On The Vector Bundle Over a 2-dimensional Manifold
Bang, Keumseong 가톨릭대학교 자연과학연구소 2001 자연과학논문집 Vol.22 No.-
We study general vector bundle E, of codimension ≥ 2, over a 2-dimensional manifold M and show that if the bundle E with the Sasaki metric is conformally flat, then the base manifold M must be flat.