Abstract
We study (non-geodesic) normal magnetic curves of three-dimensional normal almost paracontact manifolds. We compute their curvature and torsion as well as a Lancret invariant (in the non-Legendre case) and the mean curvature vector field. Two 1-parameter families of magnetic curves (first space like and second time like) are obtained in quasi-para-Sasakian manifolds which are not para-Sasakian; these are non-Legendre helices.
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Călin, C., Crasmareanu, M. Magnetic Curves in Three-Dimensional Quasi-Para-Sasakian Geometry. Mediterr. J. Math. 13, 2087–2097 (2016). https://doi.org/10.1007/s00009-015-0570-y
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DOI: https://doi.org/10.1007/s00009-015-0570-y