enumerable languages is called RE. There are three equivalent definitions of a recursively enumerable language: A recursively enumerable language is a recursively...

theory, a set S of natural numbers is called computably enumerable (c.e.), recursively enumerable (r.e.), semidecidable, partially decidable, listable,...

recursively enumerable, but not recursive? And, furthermore, are there languages which are not even recursively enumerable? The halting problem is one of...

function, or the empty set. Computably enumerable Decidability (logic) Recursively enumerable language Recursive language Recursion That is, under the Set-theoretic...

class RP. This type of language was not defined in the Chomsky hierarchy. All recursive languages are also recursively enumerable. All regular, context-free...

the language ⟨ ≤, = ⟩. A degree is called recursively enumerable (r.e.) or computably enumerable (c.e.) if it contains a recursively enumerable set....

context-free language is context-sensitive, every context-sensitive language is recursive and every recursive language is recursively enumerable. These are...

grammar Prefix grammar Pumping lemma Recursively enumerable language Regular expression Regular grammar Regular language S-attributed grammar Star height...

Recursively enumerable languages are closed under Kleene star, concatenation, union, and intersection, but not under set difference; see Recursively enumerable...

reducible to non-recursively defined values: in this case F(0) = 0 and F(1) = 1. Applying the standard technique of proof by cases to recursively defined sets...

context free languages can be any recursively enumerable language. The quotient of two recursively enumerable languages is recursively enumerable. These closure...

computable. The set being enumerated is then called recursively enumerable (or computably enumerable in more contemporary language), referring to the use...

call a subset U of FS recursive (respectively recursively enumerable) if f(U) is recursive (respectively recursively enumerable). If S is indexed as above...

{\displaystyle \{s_{1},...,s_{n-1}\}} . It is shown that a class of recursively enumerable languages is learnable in the limit if it has finite elasticity. A bound...

making the notion of recursive enumerability perfectly rigorous. It is evident that Diophantine sets are recursively enumerable (also known as semi-decidable)...

if and only if the word w is in the language. The term enumerable has the same etymology as in computably enumerable sets of natural numbers. The following...

context-free languages and the recursively enumerable languages, and other families of formal languages studied in the scientific literature. A formal language is...

alphabet. A set of strings which can be enumerated in this manner is called a recursively enumerable language. The Turing machine can equivalently be...

Kleene's recursion theorem Recursively enumerable set Recursively enumerable language Decidable language Undecidable language Rice's theorem Post's theorem...

Peano arithmetic) is also recursively enumerable, as one can enumerate all the proofs of the theory. While all primitive recursive functions are provably...

its set of theorems is recursively enumerable. This means that there is a computer program that, in principle, could enumerate all the theorems of the...

recognizable languages are also recursively enumerable. Proof A Turing Recognizable language can be Enumerated by an Enumerator Consider a Turing Machine M...

computable function and computably enumerable (c.e.) set instead of partial recursive function and recursively enumerable (r.e.) set. Not all researchers...

computing – Recursive descent parser – Recursion (computer science) – Recursive set – Recursively enumerable language – Recursively enumerable set – Reference...

recursion tree recursive (computer science) recursive data structure recursive doubling recursive language recursively enumerable language recursively solvable...

partially decidable, semi-decidable, solvable, or provable if A is a recursively enumerable set. In computability theory, the halting problem is a decision...

Primitive recursive function Recursion (computer science) Recursive language Recursive set Recursively enumerable language Recursively enumerable set Reduction...

machine can calculate any recursive function, decide any recursive language, and accept any recursively enumerable language. According to the Church–Turing...

simply m-complete, iff B {\displaystyle B} is recursively enumerable and every recursively enumerable set A {\displaystyle A} is m-reducible to B {\displaystyle...

automaton Chomsky hierarchy Context-sensitive language, context-sensitive grammar Recursively enumerable language Register machine Stack machine Petri net...