feat(MultitapeTM): Prove an exponential upper bound in the number of configurations reachable in bounded space - #772
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…hable in bounded space.
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Proves an upper bound on the number of configurations reachable in bounded space on a multi-tape TM.
The proof introduces a structure that uses a different index set for the tapes and proves equivalence, then shows that a finite index set that depends on the space bound is sufficient.