NP-hard

Computing, Computing theory, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences A problem H is NP-hard if and only if there is an NP-complete problem L that is polynomial time Turing-reducible to H.

Computing, Computing theory, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences An alternative definition restricts NP-hard to decision problems and then uses polynomial-time many-one reduction instead of Turing reduction.