2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36618A quantum picture of the causal structure of Minkowski space M is presented. The mathematical model employed to this end is a non-classical version of the classical topos {H} of real quaternion algebras used elsewhere to organize the perceptions of spacetime events of a Boolean observer into M. Certain key properties of this new quantum topos are highlighted by contrast against the corresponding ones of its classical counterpart {H} modelling M and are seen to accord with some key features of the algebraically quantized causal set structure.LaTeX 2.09, 20 pagesGeneral Relativity and Quantum Cosmologytext