The differential geometry of curves on a hypersphere in
the Euclidean space reflects instantaneous properties of spherecal
motion. In this work, we give some results for differential geometry of
spacelike curves in 3-dimensional de-Sitter space. Also, we study the Frenet
reference frame, the Frenet equations, and the geodesic curvature and torsion
functions to analyze and characterize the shape of the curves in 3-dimensional
de-Sitter space.
References
[1]
B. O’Neill, “Semi-Riemann Geometry: With Applictions to Relativity,” Academic Press, New York, 1983, 469 p.
[2]
T. Fusho and S. Izumiya, “Lightlike Surfaces of Spacelike Curves in de Sitter 3-Space,” Journal of Geometry, Vol. 88, 2008, pp. 19-29.
http://dx.doi.org/10.1007/s00022-007-1944-5
[3]
M. Kasedou, “Singularities of Lightcone Gauss Images of Spacelike Hypersurfaces in de Sitter Space,” Journal of Geometry, Vol. 94, 2009, pp. 107-121.
http://dx.doi.org/10.1007/s00022-009-0001-y
[4]
J. M. McCarthy, “The Differential Geometry of Curves in an Image Space of Spherical Kinematics,” Mechanism and Machine Theory, Vol. 22, No. 3, 1987, pp. 205-211.
http://dx.doi.org/10.1016/0094-114X(87)90003-6
[5]
J. M. McCarthy and B. Ravani, “Differential Kinematics of Spherical and Spatial Motions Using Kinematic Mapping,” Journal of Applied Mechanics, Vol. 53, No. 1, 1986, pp. 15-22. http://dx.doi.org/10.1115/1.3171705
[6]
B. Ravani and B. Roth, “Mappings of Spatial Kinematics,” Journal of Mechanisms, Transmissions and Automation in Design, Vol. 106, No. 3, 1984, pp. 341-347.
http://dx.doi.org/10.1115/1.3267417
[7]
M. P. Do Carmo, “Differential Geometry of Curves and Surfaces,” Prentice-Hall, Englewood Cliffs, 1976, 503 p.