في Greg Egan's The Clockwork Rocket (أول كتاب في سلسلة "متعامد") ، يجادل يلدا بأن
If the cosmos were like the surface of the sphere, everything would be "absurdly predictable" and observing the light field in one speck of the cosmos would give you all the information about the entire field in all of four-space.
مع ذلك ، لاحقًا في The Arrows of Time (الكتاب الثالث) ،
Scientists agree that the cosmos actually has the topology of a 4-sphere (after ruling out the torus). The issue Yalda pondered in the first book is not brought up again.
هل هذا يعني
that predictability does not matter so much after all (considering that it is even possible to send messages backwards in time)? I am slightly surprised that the issue that was discussed in great length in the first book does not surface again here.
(هذا هو أساسًا متابعة الطوبولوجيا الكونية في جريج Egan's Orthogonal Universe ، ولكن لا يُسمح لي بالتعليق هناك).