Abstract
In Lorentz–Minkowski space, the angles between any two non-null vectors have been defined in the sense of the angles in Euclidean space. In this work, the angles relating to lightlike vectors are characterized by the Frenet frame of a pseudo null curve and the angles between any two non-null vectors in Minkowski 3-space. Meanwhile, the explicit measuring methods are demonstrated through several examples.
Funding Information
  • National Natural Science Foundation of China (11801065)
  • National Research Foundation of Korea (2016R1A2B1006974)

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