Null $φ$-Slant Curves in a Main Class of 3-Dimensional Normal Almost Contact B-Metric Manifolds

We introduce a new type of slant curves in almost contact B-metric manifolds, called $φ$-slant curves, by an additional condition which is specific for these manifolds. In this paper we study $φ$-slant null curves in a class of 3-dimensional normal almost contact B-metric manifolds and prove that for non-geodesic of them there exists a unique Frenet frame for which the original parameter is distinguished. We investigate some of $φ$-slant null curves and with respect to the associated B-metric on the manifold and find relationships between the corresponding Frenet frames and curvatures. We construct the examined curves in a 3-dimensional Lie group and give their matrix representation.

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