What stays coherent when everything expands at once?
The containing geometry and the relationships inside it expanding concurrently.
Q.39 October 2026seedopen question
Most descriptions hold the container fixed and let the contents change, or the reverse. I am asking about both expanding together: the boundary of what is permissible and the relationships inside it.
A question, not a model. It would need a description of a container that changes over time before anything could be claimed.