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- Dae Won Yoon
- 2004

In this article, we establish a sharp inequality involving δ-invariant introduced by Chen for submanifolds in quaternionic space forms of constant quaternionic sectional curvature with arbitrary codimension. Mathematics Subject Classification: 53B25, 53B35.

- DAE WON YOON, WON YOON
- 2007

In this paper, we study some properties of ruled surfaces with non-degenerate second fundamental form in a 3-dimensional LorentzMinkowski space related to its the Gaussian curvature, the second Gaussian curvature and the mean curvature.

- Young Ho Kim, Dae Won Yoon
- 2007

In this paper, we classify ruled surfaces in Lorentz-Minkowski 3-spaces satisfying some algebraic equations in terms of the second Gaussian curvature, the mean curvature and the Gaussian curvature.

- Chul Woo Lee, Young Ho Kim, Dae Won Yoon
- Applied Mathematics and Computation
- 2010

- Miekyung Choi, Young Ho Kim, +5 authors WON YOON
- 2010

The helicoidal surface is a generalization of rotation surface in a Minkowski space. We study helicoidal surfaces in a Minkowski 3-space in terms of their Gauss map and provide some examples of new classes of helicoidal surfaces with constant mean curvature in a Minkowski 3-space.

- Dae Won Yoon, Dong-Soo Kim, Young Ho Kim, Jae Won Lee
- Symmetry
- 2017

For the mean curvature vector field H and the Laplace operator ∆ of a submanifold in the Minkowski space, a submanifold satisfying the condition ∆H = f H + gC is known as a generalized null 2-type, where f and g are smooth functions, and C is a constant vector. The notion of generalized null 2-type submanifolds is a generalization of null 2-type… (More)

- Dae Won Yoon
- 2015

In the present paper, we study rotational surfaces in the three dimensional pseudo-Galilean space G3. Also, we characterize rotational surfaces in G3 in terms of the position vector field, Gauss map and Laplacian operator of the second fundamental form on the surface.

- Dae Won Yoon, Dong-Soo Kim, Young Ho Kim, Jae Won Lee
- Symmetry
- 2017

Our principal goal is to study the prescribed curvature problem in a manifold with density. In particular, we consider the Euclidean 3-space R3 with a positive density function eφ, where φ = −x2 − y2, (x, y, z) ∈ R3 and construct all the helicoidal surfaces in the space by solving the second-order non-linear ordinary differential equation with the weighted… (More)

- Dae Won Yoon
- J. Applied Mathematics
- 2014

- Dae Won Yoon
- J. Applied Mathematics
- 2012