Reductions
If you can solve one problem, can you solve another? Reductions are the tool that lets us answer that question precisely — and they are the key to everything in Phase 2.
If you can solve one problem, can you solve another? Reductions are the tool that lets us answer that question precisely — and they are the key to everything in Phase 2.
In 1971, Stephen Cook proved that one specific problem sits at the top of the entire NP hierarchy — and that solving it would solve everything else. This is the result that launched the field of NP-Completeness.