Theory: Difference between revisions
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==Formal Languages== | ==Formal Languages== | ||
===Regular Languages (Class [http://qwiki.stanford.edu/wiki/Complexity_Zoo:R#reg REG])=== | ===Regular Languages (Class [http://qwiki.stanford.edu/wiki/Complexity_Zoo:R#reg REG])=== | ||
* Type 3 of the [[Chomsky Hierarchy]] | * Type 3 of the [[Chomsky Hierarchy]] (rewrite rules: A→a and A→aB) | ||
* Recognized by finite state machines. Equivalent to [http://qwiki.stanford.edu/wiki/Complexity_Zoo:D#dspace DSPACE(1)]. | * Recognized by finite state machines. Equivalent to [http://qwiki.stanford.edu/wiki/Complexity_Zoo:D#dspace DSPACE(1)]. | ||
* Closed under union, concatenation, Kleene, intersection, difference, complement, reverse, right-quotient, homomorphism | * Closed under union, concatenation, Kleene, intersection, difference, complement, reverse, right-quotient, homomorphism | ||