As far as I understand NP-complete problems are problems that are NP and have some other problem that is reducible to itself. Basically it is a set of problems that are NP-complete and if one is solved all are solved, right?(adsbygoogle = window.adsbygoogle || []).push({});

What is the point of defining such set of problems? Also there might be several such sets of NP-complete problems, right?

Also, I see that there are even more classification of problems like NP-hard, RE complete etc. Again, what's the point?

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# NP complete problems

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