Vol. 261, No. 2, 2013

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Ruled minimal surfaces in the three-dimensional Heisenberg group

Heayong Shin, Young Wook Kim, Sung-Eun Koh, Hyung Yong Lee and Seong-Deog Yang

Vol. 261 (2013), No. 2, 477–496
Abstract

It is shown that parts of planes, helicoids and hyperbolic paraboloids are the only minimal surfaces ruled by geodesics in the three-dimensional Riemannian Heisenberg group. It is also shown that they are the only surfaces in the three-dimensional Heisenberg group whose mean curvature is zero with respect to both the standard Riemannian metric and the standard Lorentzian metric.

Keywords
Heisenberg group, ruled surface, minimal surface
Mathematical Subject Classification 2010
Primary: 53A35
Milestones
Received: 6 October 2011
Revised: 14 September 2012
Accepted: 24 September 2012
Published: 20 March 2013
Authors
Heayong Shin
Department of Mathematics
Chung-Ang University
Seoul 156-756
South Korea
Young Wook Kim
Department of Mathematics
Korea University
Seoul 136-701
South Korea
Sung-Eun Koh
Department of Mathematics
Konkuk University
Seoul 143-701
South Korea
Hyung Yong Lee
Department of Mathematics
Korea University
Seoul 136-713
South Korea
Seong-Deog Yang
Department of Mathematics
Korea University
Seoul 136-713
South Korea