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This tag covers algorithms that enumerate some set, whether finite or infinite. Do not use it for questions about computability classes, such as recursively enumerable (RE) sets; use tags [computability] and [semi-decidability] for these.

4 votes
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459 views

Is there a proof of the recursive algorithm for generating all permutations of a sequence?

For clarity, I attach below a concise implementation of the algorithm in Python. I understand that it checks all possible element swaps, but I don't see how that necessarily means that all possible or …