VDict mobile



complexity A set or property of computational searchproblems. A problem is NP-hard if solving it in polynomialtime would make it possible to solve all problems in class
NP in polynomial time.
Some NP-hard problems are also in NP (these are called
"NP-complete"), some are not. If you could reduce an NP
problem to an NP-hard problem and then solve it in polynomial
time, you could solve all NP problems.
[Examples?]
(1995-04-10)