• Thumbnail for Chomsky hierarchy
    The Chomsky hierarchy in the fields of formal language theory, computer science, and linguistics, is a containment hierarchy of classes of formal grammars...
    12 KB (1,349 words) - 18:45, 15 March 2025
  • Thumbnail for Noam Chomsky
    grammar theory, the generative grammar theory, the Chomsky hierarchy, and the minimalist program. Chomsky also played a pivotal role in the decline of linguistic...
    199 KB (18,634 words) - 13:39, 25 April 2025
  • theorem (after American mathematician Stephen Cole Kleene). In the Chomsky hierarchy, regular languages are the languages generated by Type-3 grammars...
    29 KB (3,424 words) - 23:25, 20 April 2025
  • Thumbnail for Formal grammar
    type.) When Noam Chomsky first formalized generative grammars in 1956, he classified them into types now known as the Chomsky hierarchy. The difference...
    24 KB (3,450 words) - 14:55, 5 May 2025
  • Thumbnail for Context-free grammar
    authors, however, reserve the term for more restricted grammars in the Chomsky hierarchy: context-sensitive grammars or context-free grammars. In a broader...
    46 KB (6,143 words) - 21:09, 21 April 2025
  • more complex language specification than the one before it, i.e. Chomsky hierarchy, and each corresponding to a class of automata which recognizes it...
    18 KB (2,169 words) - 08:48, 2 March 2025
  • generated language L(p), modulo associativity of (⋅). In a refined Chomsky hierarchy, the class of pattern languages is a proper superclass and subclass...
    15 KB (1,261 words) - 06:53, 22 July 2024
  • Thumbnail for Automata theory
    Turing machine programs by Shannon. In the same year, Noam Chomsky described the Chomsky hierarchy, a correspondence between automata and formal grammars...
    32 KB (3,851 words) - 14:40, 16 April 2025
  • noncontracting grammar). Context-sensitive is known as type-1 in the Chomsky hierarchy of formal languages. Computationally, a context-sensitive language...
    9 KB (1,340 words) - 03:58, 19 March 2025
  • Thumbnail for Formal language
    of machine tools. Noam Chomsky devised an abstract representation of formal and natural languages, known as the Chomsky hierarchy. In 1959 John Backus developed...
    27 KB (3,163 words) - 09:25, 2 May 2025
  • used for the class RP. This type of language was not defined in the Chomsky hierarchy. All recursive languages are also recursively enumerable. All regular...
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  • Recursively enumerable languages are known as type-0 languages in the Chomsky hierarchy of formal languages. All regular, context-free, context-sensitive...
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  • positioned between context-free and unrestricted grammars in the Chomsky hierarchy. A formal language that can be described by a context-sensitive grammar...
    27 KB (3,503 words) - 19:16, 28 October 2024
  • Thumbnail for Syntax (programming languages)
    this ideal model. The levels generally correspond to levels in the Chomsky hierarchy. Words are in a regular language, specified in the lexical grammar...
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  • complexity hierarchies: Polynomial hierarchy Exponential hierarchy Chomsky hierarchy Ineffective complexity hierarchies: Arithmetical hierarchy Hyperarithmetical...
    4 KB (460 words) - 14:35, 29 July 2024
  • arises from the simplicity of the language. The Chomsky (1956) hierarchy is a containment hierarchy of classes of formal grammars that generate formal...
    73 KB (8,991 words) - 22:54, 22 December 2024
  • Anti-Chomsky Reader, 2004 Chomsky hierarchy, for classifying formal grammars Chomsky normal form, a notation for formal grammars Chomsky–Schützenberger theorem...
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  • complex than regular expressions and as such less than level 3 in the Chomsky hierarchy. To compensate for the simple pattern matching capabilities, AIML...
    9 KB (931 words) - 13:40, 15 March 2025
  • group (methanylylidene, methylylidene) =CH− Chomsky hierarchy, in computer science, a containment hierarchy of classes of formal grammars Continuum hypothesis...
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  • string with A (as the leftmost symbol). All types of grammars in the Chomsky hierarchy can be recursive and it is recursion that allows the production of...
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  • Thumbnail for Regular expression
    languages. NFAs are a simple variation of the type-3 grammars of the Chomsky hierarchy. In the opposite direction, there are many languages easily described...
    97 KB (8,860 words) - 20:26, 3 May 2025
  • Chomsky hierarchy Grammars Languages Abstract machines Type-0 — Type-1 — — — — — Type-2 — — Type-3 — — Unrestricted (no common name) Context-sensitive...
    10 KB (1,532 words) - 14:55, 30 July 2024
  • context-sensitive grammars and have had important roles in refining the Chomsky hierarchy. Various subgrammars, such as the linear indexed grammar, can thus...
    9 KB (1,315 words) - 09:16, 16 December 2023
  • Thumbnail for Pumping lemma for regular languages
    Chomsky hierarchy Grammars Languages Abstract machines Type-0 — Type-1 — — — — — Type-2 — — Type-3 — — Unrestricted (no common name) Context-sensitive...
    15 KB (2,290 words) - 06:31, 14 April 2025
  • Phrase structure grammar (category Noam Chomsky)
    authors, however, reserve the term for more restricted grammars in the Chomsky hierarchy: context-sensitive grammars or context-free grammars. In a broader...
    4 KB (418 words) - 17:28, 15 February 2025
  • Lex can be implemented by a finite-state automata as shown by the Chomsky hierarchy of languages. To recognize more complex languages, Lex is often used...
    8 KB (883 words) - 06:30, 14 April 2025
  • machine Abstract machine Cell-probe model Robertson–Webb query model Chomsky hierarchy Turing completeness "Models of Computation" (PDF). Fernández, Maribel...
    4 KB (381 words) - 21:54, 12 March 2025
  • a general way. Moreover, the examination of languages within the Chomsky hierarchy indicates that there is no formal and consequently automated way of...
    10 KB (1,265 words) - 17:32, 23 April 2025
  • structure grammars) is the most general class of grammars in the Chomsky hierarchy. No restrictions are made on the productions of an unrestricted grammar...
    6 KB (860 words) - 00:41, 24 June 2024
  • most applied result in combinatorics on words is the Chomsky hierarchy, developed by Noam Chomsky. He studied formal language in the 1950s. His way of...
    20 KB (2,588 words) - 12:32, 13 February 2025