Complexity classes

NL-complete

In computational complexity theory, NL-complete is a complexity class containing the languages that are complete for NL, the class of decision problems that can be solved by a nondeterministic Turing machine using a logarithmic amount of memory space. The NL-complete languages are the most "difficult" or "expressive" problems in NL. If a deterministic algorithm exists for solving any one of the NL-complete problems in logarithmic memory space, then NL = L. (Wikipedia).

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Related pages

Propositional calculus | Conjunctive normal form | Complement (set theory) | NL (complexity) | 2-satisfiability | L (complexity) | Sardinas–Patterson algorithm | Computational complexity theory | P (complexity) | Decision problem | Immerman–Szelepcsényi theorem | Reduction (complexity) | Nondeterministic Turing machine | Complete (complexity) | Complexity class | Variable-length code