Figure 1From: A natural Frenet frame for null curves on the lightlike cone in Minkowski space \(\mathbb{R} ^{4}_{2}\)\(x(s)=\sqrt{s} (\cos \theta -\sin \theta ,\cos \theta + \sin \theta , \sqrt{2}\cos \theta ,\sqrt{2}\sin \theta )\), \(\theta =\frac{\sqrt{15}}{2}\ln s^{2}\)Back to article page