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Results tagged with automata-theory
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user 758
Automata Theory, including abstract machines, grammars, parsing, grammatical inference, transducers, and finite-state techniques
4
votes
Where do most REGEX implementations fall on the complexity scale?
PCRE, the most popular implementation of "regular expressions" also implements recursive patterns, which go beyond backreferences. A questions about their complexity has just been asked at Stackoverfl …
- 1,259
50
votes
5
answers
7k
views
Is the Chomsky-hierarchy outdated?
The Chomsky(–Schützenberger) hierarchy is used in textbooks of theoretical computer science, but it obviously only covers a very small fraction of formal languages (REG, CFL, CSL, RE) compared to the …
- 1,259