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The various complexity classes usually taught and studied ($P$, $NP$ $co-NP$, EXP, NSPACE etc) are usually defined using Turing Machines as the preferred model of computation.

Are these sets of decision problems (complexity classes) independent of the model of computation used?

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  • $\begingroup$ It depends on the model of computation... but many of these classes are quite robust. $\endgroup$ – Yuval Filmus Sep 17 '19 at 14:16

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