nondeterministic turing machine
71Nondeterminism — may refer to: Nondeterministic programming (computer science) Nondeterministic algorithm (computer science) Non deterministic Turing machine (computer science) Indeterminacy in computation (disambiguation) Indeterminism (philosophy) See also… …
722-satisfiability — In computer science, 2 satisfiability (abbreviated as 2 SAT or just 2SAT) is the problem of determining whether a collection of two valued (Boolean or binary) variables with constraints on pairs of variables can be assigned values satisfying all… …
73Fagin's theorem — is a result in descriptive complexity theory which states that the set of all properties expressible in existential second order logic is precisely the complexity class NP. It is remarkable since it is a characterization of the class NP which… …
74Regular language — In theoretical computer science, a regular language is a formal language (i.e., a possibly infinite set of finite sequences of symbols from a finite alphabet) that satisfies the following equivalent properties: * it can be accepted by a… …
75Noam Chomsky — Chomsky redirects here. For other topics with the same name, see Chomsky (disambiguation). Noam Chomsky Noam Chomsky visiting Vancouver, Canada in 2004 …
76NTIME — In computational complexity theory, the complexity class NTIME(f(n)) is the set of decision problems that can be solved by a non deterministic Turing machine using time O(f(n)), and unlimited space. The well known complexity class NP can be… …
77Dehn function — In the mathematical subject of geometric group theory, a Dehn function, named after Max Dehn, is an optimal function associated to a finite group presentation which bounds the area of a relation in that group (that is a freely reduced word in the …
78Polynomial space — In computational complexity theory, polynomial space refers to the space required in computation of a problem where the space, m ( n ), is no greater than a polynomial function of the problem size, n .Written mathematically, m ( n ) = O( n k )… …
79Context-sensitive grammar — A context sensitive grammar (CSG) is a formal grammar in which the left hand sides and right hand sides of any production rules may be surrounded by a context of terminal and nonterminal symbols. Context sensitive grammars are more general than… …
80Context-free language — In formal language theory, a context free language is a language generated by some context free grammar. The set of all context free languages is identical to the set of languages accepted by pushdown automata. Contents 1 Examples 2 Closure… …
