Formal languages

concept in mathematics

type of analytic formal grammar

one of the two main notation techniques for context-free grammars in computer science

formal grammar

idempotent semiring endowed with a closure operator

context-free grammar that has at most one nonterminal in the right hand side of each of its productions

type of a context-free grammar

rewriting system over strings from an alphabet

formal system for transcribing expressions into equivalent terms

in mathematics, some kind of formal language

formal language models

positional numeral system with signed digits; the representation may not be unique

family of formalisms in natural language syntax motivated by the principle of compositionality and organized according to the view that syntactic constituents should generally combine as functions or according to a function-argument relationship

means of expressing grammatical relationships

formal language in computational complexity theory

a formal grammar in which instead of single productions, productions are grouped together into finite sequences, which are referred to as matrices

type of formal language in computational complexity theory

state machine for tree structures

an object that cannot be rewritten further

a sequence of symbols that does not contain any repeated contiguous subsequence

mathematical concept

rule for describing which strings of symbols formed from the alphabet of a formal language are syntactically valid within the language