Twistor space
In mathematics and theoretical physics (especially twistor theory), twistor space is the complex vector space of solutions of the twistor equation ∇ A ′ ( A Ω B ) = 0 {\displaystyle \nabla _{A'}^{(A}\Omega _{^{}}^{B)}=0} . It was described in the 1960s by Roger Penrose and Malcolm MacCallum.