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Subset of languages in formal theory
formal language theory, deterministic context-free languages (DCFL) are a proper subset of context-free languages. They are context-free languages that
Deterministic context-free language
Deterministic_context-free_language
Formal grammar derived from a deterministic pushdown automaton
grammars that can be derived from deterministic pushdown automata, and they generate the deterministic context-free languages. DCFGs are always unambiguous
Deterministic context-free grammar
Deterministic_context-free_grammar
Formal language generated by context-free grammar
subclass of context-free languages are the deterministic context-free languages which are defined as the set of languages accepted by a deterministic pushdown
Context-free_language
Topics referred to by the same term
Synchronous context-free grammar Context-free language Deterministic context-free language All pages with titles containing Context-free Context (disambiguation)
Context-free
Type of a context-free grammar
A language that has an LL grammar is known as an LL language. These form subsets of deterministic context-free grammars (DCFGs) and deterministic context-free
LL_grammar
Abstract machine in computer science
deterministic pushdown automata accepts the deterministic context-free languages, a proper subset of context-free languages. Machine transitions are based on the
Deterministic pushdown automaton
Deterministic_pushdown_automaton
Type of automaton
Deterministic pushdown automata can recognize all deterministic context-free languages while nondeterministic ones can recognize all context-free languages
Pushdown_automaton
) The deterministic context-free languages are a proper subset of the context-free languages which can be efficiently parsed by deterministic pushdown
Comparison of parser generators
Comparison_of_parser_generators
Rule system for formal languages
In formal language theory, a context-free grammar (CFG) is a formal grammar whose production rules can be applied to a nonterminal symbol regardless of
Context-free_grammar
Type of context-free grammar
admits ambiguous grammars is called an inherently ambiguous language. Deterministic context-free grammars are always unambiguous, and are an important subclass
Ambiguous_grammar
Language defined by context-sensitive grammar
In formal language theory, a context-sensitive language is a formal language that can be defined by a context-sensitive grammar, where the applicability
Context-sensitive_language
Hierarchy of classes of formal grammars
nonterminals. These languages are exactly all languages that can be recognized by a non-deterministic pushdown automaton. Context-free languages—or rather its
Chomsky_hierarchy
Form of source code, without regard to meaning
Phrases are in a context-free language (CFL), generally a deterministic context-free language (DCFL), specified in a phrase structure grammar, which is
Syntax (programming languages)
Syntax_(programming_languages)
Type of pumping lemma
In computer science, in particular in formal language theory, the pumping lemma for context-free languages, also known as the Bar-Hillel lemma, is a lemma
Pumping lemma for context-free languages
Pumping_lemma_for_context-free_languages
Parsing related to computer science
keeping the deterministic behavior. Deterministic context-free grammar Alfred V. Aho, Stephen C. Johnson, Jeffrey D. Ullman (1975): Deterministic parsing
Deterministic_parsing
Finite-state machine
deterministic finite automaton (DFA)—also known as deterministic finite acceptor (DFA), deterministic finite-state machine (DFSM), or deterministic finite-state
Deterministic finite automaton
Deterministic_finite_automaton
Type of parser in computer science
LR parsers are a type of bottom-up parser that analyse deterministic context-free languages in linear time. There are several variants of LR parsers:
LR_parser
Algorithm used to analyze and process programming languages
repetitive and hard to understand. LR(k) can handle all deterministic context-free languages. In the past this LR(k) parser has been avoided because of
Canonical_LR_parser
Formal language concept
language class lies properly between the regular languages and the deterministic context-free languages. Since their introduction in 2004, these concepts
Nested_word
Study of abstract machines and automata
closely related to formal language theory. In this context, automata are used as finite representations of formal languages that may be infinite. Automata
Automata_theory
Type of formal grammar
positioned between context-free and unrestricted grammars in the Chomsky hierarchy. A formal language that can be described by a context-sensitive grammar
Context-sensitive_grammar
Formal language in mathematics and computer science
the set of well-formed formulas in Presburger arithmetic is context-free, every deterministic Turing machine accepting the set of true statements in Presburger
Recursive_language
Structure of a formal language
the language, where n {\displaystyle n} is the length of the string. Deterministic context-free languages is a subset of context-free languages that
Formal_grammar
State machine for tree structures
correspond to regular languages of trees. As with classical automata, finite tree automata (FTA) can be either a deterministic automaton or not. According
Tree_automaton
Compiler-generation system
lexical and syntactic analyzers (parsers) (both deterministic and non-deterministic) for all kinds of context-free grammars (CFGs) as well as some classes of
SYNTAX
Educational software
Topics on context-free language include: pushdown automata context-free grammar proof on wikt:nondeterministic pushdown automaton to context-free grammar
JFLAP
Type of formal grammar
given string. The Lempel-Ziv-Welch algorithm creates a context-free grammar in such a deterministic way that it is necessary to store only the start rule
Straight-line_grammar
American computer scientist
languages accepted with finite delay. Hence the family of deterministic context-free language is a principal AFDL; there is a context-free language L
Sheila_Greibach
Question in theoretical computer science
pushdown automata or any machine that can decide context-free languages or more powerful languages. P. Jančar. Equivalences of Pushdown Systems Are Hard
Equivalence_problem
Type of parser in computer science
Rightmost derivation). The LR parser can recognize any deterministic context-free language in linear-bounded time. Rightmost derivation has very large
LALR_parser
Formal language that can be expressed using a regular expression
(NFA) it is the language accepted by a deterministic finite automaton (DFA) it can be generated by a regular grammar it is the language accepted by an
Regular_language
hand-designed type of finite-state machine (FSM) termed a deterministic finite automaton (DFA) grammar as a language model. It can be used to build a kind of voice
Julius_(software)
grammar is a context-free grammar that has at most one nonterminal in the right-hand side of each of its productions. A linear language is a language generated
Linear_grammar
of memory space. The NL-complete languages are the most "difficult" or "expressive" problems in NL. If a deterministic algorithm exists for solving any
NL-complete
Formal language models
(context-free languages)". He called these grammars mildly context-sensitive grammars and the associated languages mildly context-sensitive languages.
Mildly context-sensitive grammar formalism
Mildly_context-sensitive_grammar_formalism
Complexity class of decision problems
must be a single algorithm that satisfies both constraints. Deterministic context-free languages can be recognized in SC. SC contains Randomized L and Bounded-Error
PolyL
Belief that events are determined by prior ones
all events within the universe can occur only in one possible way. Deterministic theories throughout the history of philosophy have developed from diverse
Determinism
Complexity class
of context-free languages recognized by deterministic pushdown automata, is contained in SC, as shown by Cook in 1979. It is open if all context-free languages
SC_(complexity)
Rewriting system and type of formal grammar
address the challenges of inferring deterministic, stochastic, and parametric L-systems: Deterministic Context-Free L-Systems (D0L): The PMIT-D0L tool
L-system
bison, a pun on the original Yacc/Yak. See Comparison of deterministic context-free language parser generators for a more detailed list. The LALR parser
LALR_parser_generator
Set of problems in computational complexity theory
instance, the class P is the set of decision problems solvable by a deterministic Turing machine in polynomial time. There are, however, many complexity
Complexity_class
automaton Context-free grammar Büchi automaton Chomsky hierarchy Context-sensitive language, context-sensitive grammar Recursively enumerable language Register
List of computability and complexity topics
List_of_computability_and_complexity_topics
Academic journal
Description: LR parser, which does bottom up parsing for deterministic context-free languages. Later derived parsers, such as the LALR parser, have been
Information_and_Computation
grammar is a kind of grammar for formal languages. Technically, an operator precedence grammar is a context-free grammar that has the property (among others)
Operator-precedence_grammar
the language to be learned, thereby refining the structure of their automaton. In 1959, Solomonoff generalized this approach to context-free languages, which
Induction of regular languages
Induction_of_regular_languages
Parser algorithm for languages
non-deterministic and ambiguous grammars. The theoretical foundation was provided in a 1974 paper by Bernard Lang (along with other general context-free parsers
GLR_parser
Lifetime of a computer software object
of an object is generally deterministic, but destruction varies by programming context. Some contexts allow for deterministic destruction, but some do
Object_lifetime
Mathematical model of computation
machines are of two types—deterministic finite-state machines and non-deterministic finite-state machines. For any non-deterministic finite-state machine,
Finite-state_machine
Computation model defining an abstract machine
mechanism, but a person whom he calls the "computer", who executes these deterministic mechanical rules slavishly (or as Turing puts it, "in a desultory manner")
Turing_machine
Programming language
reference counting, and fully manual systems, with the default being deterministic reference counting with optimizations via move semantics and cycle collection
Nim_(programming_language)
Form for context-free grammars
conversion can be used to prove that every context-free language can be accepted by a real-time (non-deterministic) pushdown automaton, i.e., the automaton
Greibach_normal_form
Abstract machine used in a formal logic and theoretical computer science
recognize a proper superset of the regular languages and a subset of the deterministic context free languages. For a given counter machine model the instruction
Counter_machine
Lemma that defines a property of regular languages
simplification of their pumping lemma for context-free languages. Let L {\displaystyle L} be a regular language. Then there exists an integer p ≥ 1 {\displaystyle
Pumping lemma for regular languages
Pumping_lemma_for_regular_languages
Type of grammar for describing formal languages
exist context-free languages that cannot be recognized by a PEG, but this is not yet proven. PEGs are well suited to parsing computer languages (and artificial
Parsing_expression_grammar
Ability to make choices voluntarily
and effect). The puzzle of reconciling 'free will' with a deterministic universe is known as the problem of free will or sometimes referred to as the dilemma
Free_will
Functions whose execution can be paused
transfers control to a coroutine given the coroutine's context as its parameter. The Mono Common Language Runtime has support for continuations, from which
Coroutine
Analysing a string of symbols, according to the rules of a formal grammar
frontend. Programming languages tend to be specified in terms of a deterministic context-free grammar because fast and efficient parsers can be written for
Parsing
Function defined on formal languages in computer science
Furthermore, there is a complete deterministic finite automaton with dR states that recognises the regular language given by R, as stated by the Myhill–Nerode
Brzozowski_derivative
General-purpose programming language
"Safer at any speed: automatic context-aware safety enhancement for Rust". Proceedings of the ACM on Programming Languages. 5 (OOPSLA). Section 2. doi:10
Rust_(programming_language)
Data structure representing a finite set of strings
In computer science, a deterministic acyclic finite state automaton (DAFSA), is a data structure that represents a set of strings, and allows for a query
Deterministic acyclic finite state automaton
Deterministic_acyclic_finite_state_automaton
than one non-empty subcontext and it is non-deterministic, but the frequency of outcomes in each sub-context is exactly the same. Analogical modeling does
Analogical_modeling
formal languages, the interchange lemma states a necessary condition for a language to be context-free, just like the pumping lemma for context-free languages
Interchange_lemma
Academic subfield of computer science
problem-solving. Context-free grammars specify programming language syntax. Non-deterministic pushdown automata are another formalism equivalent to context-free grammars
Theory_of_computation
String rewriting system
Technically, we have the following: Lemma. Let M {\displaystyle M} be a deterministic Turing machine and R {\displaystyle R} be the string rewrite system
Semi-Thue_system
Categories of symbols in formal grammars
recognized by a non-deterministic push down automaton. Context-free languages are the theoretical basis for the syntax of most programming languages. A grammar
Terminal and nonterminal symbols
Terminal_and_nonterminal_symbols
Sequence of characters that forms a search pattern
expressive power as regular grammars. But the language of regular expressions itself, is a context-free language. Regular expressions consist of constants
Regular_expression
Type of finite-state machine in automata theory
In automata theory, a finite-state machine is called a deterministic finite automaton (DFA), if each of its transitions is uniquely determined by its
Nondeterministic finite automaton
Nondeterministic_finite_automaton
Software design pattern in which resources held by objects can be explicitly released
Resource Acquisition Is Initialization (RAII) idiom, and is used in languages with deterministic memory management (e.g. C++). In this case, in the example above
Dispose_pattern
Top-down parser that parses input from left to right
computer science, an LL parser is a top-down parser for a restricted context-free language. It parses the input from Left to right, performing Leftmost derivation
LL_parser
Field of machine learning
search can be further restricted to deterministic stationary policies. A deterministic stationary policy deterministically selects actions based on the current
Reinforcement_learning
Computational complexity class
Sudborough, I. H. (July 1978). "On the Tape Complexity of Deterministic Context-Free Languages". Journal of the ACM. 25 (3): 405–414. doi:10.1145/322077
LOGCFL
regular language and a context-free language is also closed, and it has been known at least since Hartmanis that the intersection of two context-free languages
Syntactic_predicate
Process of losing a language
variability on certain rules which native speakers apply deterministically. In the context of attrition, however, there is strong evidence that this
Language_attrition
List of programming languages types and the languages that meet its description
APL Chapel Dartmouth BASIC Fortran (As of Fortran 90) FreeMat GAUSS Interactive Data Language (IDL) J Julia K MATLAB Octave PL/I Q R Raku S Scilab S-Lang
List of programming languages by type
List_of_programming_languages_by_type
will". In Human, All Too Human (1878) Nietzsche appears to defend a deterministic metaphysical stance, writing: At the sight of a waterfall we think we
Friedrich Nietzsche and free will
Friedrich_Nietzsche_and_free_will
Programming language that uses first order logic
conventional programming languages. In particular, Prolog's non-deterministic evaluation strategy can be problematic when programming deterministic computations,
Prolog
Compiler generator
notation grammars of a source language and generates a scanner and a parser for that language. The scanner works as a deterministic finite automaton. It supports
Coco/R
Philosophical concept
caused deterministically. It is the opposite of determinism and related to chance. It is highly relevant to the philosophical problem of free will, particularly
Indeterminism
that is guaranteed, by the language's syntax and semantics, to be executable both forwards and backwards deterministically. The fundamental goal of a
Reversible programming language
Reversible_programming_language
Type of formal grammar
of formal grammars studied in formal language theory. They extend the basic type of grammars, the context-free grammars, with a conjunction operation
Conjunctive_grammar
Idea that small causes can have large effects
undergoing nonlinear dynamics and deterministic chaos. The concept of the butterfly effect has since been used outside the context of weather science as a broad
Butterfly_effect
Parsing algorithm for context-free languages
LL parsers to recognize languages described by any context-free grammar. While the theory behind "generalising" deterministic parsers had already been
GLL_parser
Complexity class used to classify decision problems
defined using deterministic Turing machines as verifiers. A language L is in NP if and only if there exist polynomials p and q, and a deterministic Turing machine
NP_(complexity)
Component of a computer process
and determinism. Threads, as a model of computation, are wildly non-deterministic, and the job of the programmer becomes one of pruning that nondeterminism
Thread_(computing)
Formal grammar
S is such a context, S[t] denotes the result of filling the tree t into the hole of S. The tree language generated by G is the language L(G) = { t ∈
Regular_tree_grammar
Computer science and linguistics concept relating to non-terminal production
whether a context-free grammar produces a finite or infinite language. Nederhof, Mark-Jan; Satta, Giorgio (2002), "Parsing Non-recursive Context-free Grammars"
Recursive_grammar
Type of formal grammar
generates the language { anbncn : n ≥ 1 }, which is not context-free due to the pumping lemma. A context-sensitive grammar for the same language is shown below
Noncontracting_grammar
the iterative philosophy of prototyping. information space analysis A deterministic method, enhanced by machine intelligence, for locating and assessing
Glossary_of_computer_science
Study of programming languages via mathematical objects
semantics to non-deterministic sequential programs. Writing P for a power-domain constructor, the domain P(D) is the domain of non-deterministic computations
Denotational_semantics
partner which consists of the complements of all languages in the original class. For example, if a language L is in NP then the complement of L is in co-NP
List_of_complexity_classes
Persistent representation of language
case, written language) at the expense of the content of communication. It has also been suggested that his theories are overly deterministic, not sufficiently
Writing
Machine-learning process
deterministic way such that it is necessary to store only the start rule of the generated grammar. Sequitur and its modifications. These context-free
Grammar_induction
Documentation defining a programming language
(provided that the implementation behaves deterministically for that program). On the other hand, defining language semantics through a reference implementation
Programming language specification
Programming_language_specification
Equivalently, it is a language recognised by a local automaton, a particular kind of deterministic finite automaton. Formally, a language L over an alphabet
Local language (formal language)
Local_language_(formal_language)
Base set of symbols with which a language is formed
In formal language theory, an alphabet, often called a vocabulary in the context of terminal and nonterminal symbols, is a non-empty set of indivisible
Alphabet_(formal_languages)
Kuroda normal form is noncontracting, and therefore, generates a context-sensitive language. Conversely, every noncontracting grammar that does not generate
Kuroda_normal_form
Application of linguistics to forensics
linguistics, or language and the law is the application of linguistic knowledge, methods, and insights to the forensic context of law, language, crime investigation
Forensic_linguistics
Ability to solve a problem by an effective procedure
problem-solving. Context-free grammars specify programming language syntax. Non-deterministic pushdown automata are another formalism equivalent to context-free grammars
Computability
Abstract machine model in computer science
Each deterministic finite automaton (DFA) is an UFA, but not vice versa. DFA, UFA, and NFA recognize exactly the same class of formal languages. On the
Unambiguous_finite_automaton
Design pattern in functional programming to build generic types
denote unit, and join respectively. Some languages like Haskell even provide a pseudonym for map in other contexts called lift, along with multiple versions
Monad (functional programming)
Monad_(functional_programming)
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DETERMINISTIC CONTEXT-FREE-LANGUAGE
DETERMINISTIC CONTEXT-FREE-LANGUAGE
Male
Swedish
Danish and Swedish form of Old Norse Freyr, FREJ means "lord, master."
Surname or Lastname
Italian
Italian : from the title of rank conte ‘count’ (from Latin comes, genitive comitis ‘companion’). Probably in this sense (and the Late Latin sense of ‘traveling companion’), it was a medieval personal name; as a title it was no doubt applied ironically as a nickname for someone with airs and graces or simply for someone who worked in the service of a count.English : variant of Count, cognate with 1.French : nickname for someone in the service of a count or for someone who behaved pretentiously, from Old French conte, cunte ‘count’ (of the same derivation as 1).French (Conté) : variant of Comté (see Comte).
Girl/Female
Hindu
Content
Surname or Lastname
English (mainly southeastern)
English (mainly southeastern) : topographic name for someone who lived near a conspicuous tree, Middle English tre(w).
Surname or Lastname
English (chiefly East Anglia)
English (chiefly East Anglia) : nickname or status name from Old English frēo ‘free(-born)’, i.e. not a serf.North German : topographic or habitational name from a place named Frede or Frede(n).North German : nickname from a variant of Middle Low German wrēd ‘crooked’.
Boy/Male
Gujarati, Hindu, Indian, Jain, Kannada, Malayalam, Marathi, Telugu
Content
Surname or Lastname
English
English : nickname from Middle English freil, frel(i)e ‘frail’, ‘weak’.Possibly an Americanized spelling of German Friel 2.
Boy/Male
Tamil
Sarnvar | ஸரà¯à®¨à®µà®¾à®°
Content, Best
Sarnvar | ஸரà¯à®¨à®µà®¾à®°
Male
English
Short form of English Frederick, FRED means "peaceful ruler."
Female
English
English form of Irish BrÃgh, BREE means "force, strength."
Boy/Male
Tamil
Content
Surname or Lastname
English
English : variant spelling of Fry.North German : variant of Frey.Joseph Frye (1711/12–94) was a military officer from Andover, MA, where the family had long been of local prominence. In 1762, he was granted a township in ME, later named Fryeburg after him, and moved his family there. His great-great-grandson William Pierce Frye was born in Lewiston, ME, and served in Congress, first as a member of the House of Representatives and then the Senate from 1871 until his death in 1911.
Boy/Male
Hindu, Indian, Traditional
Content
Female
English
Anglicized form of Danish Freya, FREA means "lady, mistress."
Surname or Lastname
English (Devon)
English (Devon) : unexplained.
Boy/Male
Australian, British, English
In Liberty
Girl/Female
Tamil
Content
Male
Icelandic
Icelandic form of Old Norse Freyr, FREY means "lord, master."
Surname or Lastname
English
English : from Old French and Middle English frere ‘friar’ (Latin frater, literally ‘brother’). This was a status name for a member a religious order, especially a mendicant order, and may also have been a nickname for a pious person or for someone employed at a monastery.Americanized spelling of French Frère (see Frere).North German and Dutch : cognate of Friedrich.
Surname or Lastname
English
English : variant of Freer 1.French (Frère) : from frère ‘brother’, used as a byname for the younger of two brothers.
DETERMINISTIC CONTEXT-FREE-LANGUAGE
DETERMINISTIC CONTEXT-FREE-LANGUAGE
DETERMINISTIC CONTEXT-FREE-LANGUAGE
DETERMINISTIC CONTEXT-FREE-LANGUAGE
DETERMINISTIC CONTEXT-FREE-LANGUAGE
DETERMINISTIC CONTEXT-FREE-LANGUAGE
DETERMINISTIC CONTEXT-FREE-LANGUAGE
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