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Spanier and Rose each cover two of these three closure properties |
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[[File:DFA example multiplies of 3.svg|thumb|upright=1.1|An example of a deterministic finite automaton that accepts only binary numbers that are multiples of 3. The state S<sub>0</sub> is both the start state and an accept state. For example, the string "1001" leads to the state sequence S<sub>0</sub>, S<sub>1</sub>, S<sub>2</sub>, S<sub>1</sub>, S<sub>0</sub>, and is hence accepted.]]
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*[[Complementation of automata#With deterministic finite automata|Complement]]
*[[Kleene closure]]
*Reversal<ref name=rose/>
*Quotient
| last = Rose | first = Gene F.
| doi = 10.1016/S0022-0000(68)80029-7
| issue = 2
| journal = [[Journal of Computer and System Sciences]]
| pages = 148–168
| title = Closures which Preserve Finiteness in Families of Languages
| volume = 2
| year = 1968}}</ref>
*Substitution<ref name=spanier>{{cite journal
| last = Spanier | first = E.
| doi = 10.1080/00029890.1969.12000214
| journal = American Mathematical Monthly
| jstor = 2316423
| mr = 241205
| pages = 335–342
| title = Grammars and languages
| volume = 76
| year = 1969}}</ref>
*Homomorphism<ref name=rose/><ref name=spanier/>
}}
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