Example: discrete pseudorandom universe (skip this if you don’t care for applications)
x=x(1),x(2),x(3),… is bitstring representing history of discrete universe; x(1) big bang; x(k) state at step k. Algorithm computes x(k+1) from x(k) for kɭ. “Noise” through pseudorandom generator.
Quantum physics, uncertainty principle: No evidence our universe is not like this…
Deterministic universes: Zuse 1967 (inventor of first functional computer 1935-1941), Fredkin, ‘t Hooft (physics Nobel 1999)
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