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Each simulations will have to be more simple than what simulate it.
At the end it will be too simple to simulate anything, and then this will result in a finite number of simulations.
The stimulated universe has to be smaller than the universe so you have a finite amount of universe in universes until one universe gets to small to stimulate an universe
It should be infinite power
It can be assumed that if it is a perfect simulation of our universe, then the quantum computer that was created in the original universe would eventually be created in the simulated universe causing a sort of cascading effect of infinite simulated universes.
I'd say there is a difference between "an universe" and "the universe"
"the universe" is where we live in
and "an universe" can be variable in size and other atributes
Computers can't run evaluations on infinity- because it can't be represented.