I Space expansion and Universe as computation

[mfb]

A universe that is run by one program violates it's own limitation set on it as it would require to calculate all elements each time step regardless of the distance.

Why? It is perfectly possible to consider only elements next to place X for the computation what happens at place X. In fact, every calculation of GR and lattice QFT is doing this, and programs for tasks like weather predictions do it as well, so there are counterexamples to your statement even within this universe.

It is a huge array parallel processing entities.

That is not in conflict with a single program running that.

 

[Michael27]

Why? It is perfectly possible to consider only elements next to place X for the computation what happens at place X. In fact, every calculation of GR and lattice QFT is doing this, and programs for tasks like weather predictions do it as well, so there are counterexamples to your statement even within this universe.That is not in conflict with a single program running that.

You are right but I should elaborate as I was not clear enough. A single program is run on a single entity which in itself can have multiple processing entities however in the end the governing program is run as one entity and has to communicate with all sub processes in order to coordinate. That is what I was trying to distinguish with and did not succeed. In order for such an entity to coordinate it would have to have information send to it from every location. That is why I added the remark of multiple dimensions where the governing could retrieve and send information through as not to violate the restriction of the speed of information/light.
As always it comes down to the old paradox how can a program delete itself while it is running. There must be some governing entity to do this which in term suggests that there should be something outside the universe being able to do so.
The idea of how much computing power one needs to simulate the universe will not change due to this paradox.

"That is not in conflict with a single program running that.

Your second remark is correct as well but I hope I have clarified my position a little bit better. Without the need of a governing entity this is correct. I think the terms program and what is running the program are in conflict here.

 

[ErikZorkin]

The volume of the observable universe is roughly 9.5¹⁸⁴ cubic Planck units. While not infinite, it may as well be for all practical purposes.

You don't seem to be a good programmer, do you? Things like algorithms may be themselves simple, but able to generate indefinite arrays. It doesn't matter "how many" entities, it does matter how they are generated.

 

[Chronos]

While clever, your misdirection conveniently ignores the fact the information required to execute such a simulation is staggering. That it may be computable does not alter the fact computation time grows exponentially with the data. For example; the Illustris project, a childishly simplified [only 12 billion pixels] simulation of the observable universe, required 3 months run time on one of the worlds most advanced super computers - re: https://www.nics.tennessee.edu/illustris-project.