Three independent proofs that the 3D deployment manifold (O, R, α) admits a Lorentzian continuation: Eisenhart-Duval lift (5/5), Osterwalder-Schrader reconstruction (5/5), and Wick rotation time identification (5/5). The (2,1) base signature lifts to (3,2) = SO(3,2), the conformal group of 3D Minkowski space and the isometry group of AdS₄. Fifteen kill conditions tested, fifteen passed.
Anthony W. Eckert (Tue,) studied this question.