Null twistor
= Null twistor
{title2=$h(Z,Z)=0$}
A nonzero twistor null for the <twistor Hermitian form>. Its projective class determines a real <null geodesic> in compactified Minkowski space. For nonzero $\pi$, its affine real solutions of the <twistor incidence relation> have the form $x=x_0+r\overline\pi^A\pi^{A'}$, $r\in\mathbb R$. Twistors with $\pi=0$ encode generators at infinity rather than finite affine solutions.