General helix;
Lancret's theorem;
Curves in Lie groups;
LIE-GROUPS;
N-SPACE;
HELICES;
HYPERSURFACES;
CURVATURE;
SURFACES;
CURVES;
D O I:
10.1016/j.geomphys.2009.07.016
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
General helices in a three dimensional Lie group with a bi-invariant metric are defined and a generalization of Lancret's theorem is obtained. We conclude that the so-called spherical images of general helices are plane curves, and we obtain the so-called spherical general helices. We also give a relation between the geodesics of the so-called cylinders and general helices. (C) 2009 Elsevier B.V. All rights reserved.
机构:
Moscow MV Lomonosov State Univ, Dept Number Theory, Fac Mech & Math, Moscow 119992, RussiaMoscow MV Lomonosov State Univ, Dept Number Theory, Fac Mech & Math, Moscow 119992, Russia