I saw math paper about systems, which can remain stable for unlimited time. As far as I remember, infinity number of solutions exist for 1D, and 2D worlds. Only 3 solutions found for 3D world (named 1, 2, and 42). None found for 4D world, so, if infinite time given, 4D world will collapse into 3D world.

I can't find this paper again yet. (I'm quite busy: revolution, ongoing war, problems with health, my father died, politics, delivery for 1+y long project in less than 2 weeks, etc.)

This paper complimented view I already had in my head (everything is particle, surrounded by spherical wave, and propelled by vibrations/noise), because now I know that Universe is very simple thing in general. Nothing complex can survive in infinite time. This mean that on lower level only extremely stable (simple) systems can survive, because time is very fast on level below. On our level, we can find temporary complex systems (we live at one of them, and we itself are another example). On level above, it unlikely that we will find a complex system, chances are very low, thus what is see around us should continue for very long time and space.