Symmetries of automata
For a given reachable automaton A, we prove that the (state-) endomorphism monoid End(A) divides its characteristic monoid M(A). Hence so does its (state-)automorphism group Aut(A), and, for finite A, Aut(A) is a homomorphic image of a subgroup of the characteristic monoid. It follows that in the pr...
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| Дата: | 2015 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
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Інститут прикладної математики і механіки НАН України
2015
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| Назва видання: | Algebra and Discrete Mathematics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/152786 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Symmetries of automata / A. Egri-Nagy, C.L. Nehaniv // Algebra and Discrete Mathematics. — 2015. — Vol. 19, № 1. — С. 48-57. — Бібліогр.: 7 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1527862019-06-13T01:25:39Z Symmetries of automata Egri-Nagy, A. Nehaniv, C.L. For a given reachable automaton A, we prove that the (state-) endomorphism monoid End(A) divides its characteristic monoid M(A). Hence so does its (state-)automorphism group Aut(A), and, for finite A, Aut(A) is a homomorphic image of a subgroup of the characteristic monoid. It follows that in the presence of a (state-) automorphism group G of A, a finite automaton A (and its transformation monoid) always has a decomposition as a divisor of the wreath product of two transformation semigroups whose semigroups are divisors of M(A), namely the symmetry group G and the quotient of M(A) induced by the action of G. Moreover, this division is an embedding if M(A) is transitive on states of A. For more general automorphisms, which may be non-trivial on input letters, counterexamples show that they need not be induced by any corresponding characteristic monoid element. 2015 Article Symmetries of automata / A. Egri-Nagy, C.L. Nehaniv // Algebra and Discrete Mathematics. — 2015. — Vol. 19, № 1. — С. 48-57. — Бібліогр.: 7 назв. — англ. 1726-3255 2010 MSC:20B25, 20E22, 20M20, 20M35, 68Q70. http://dspace.nbuv.gov.ua/handle/123456789/152786 en Algebra and Discrete Mathematics Інститут прикладної математики і механіки НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
For a given reachable automaton A, we prove that the (state-) endomorphism monoid End(A) divides its characteristic monoid M(A). Hence so does its (state-)automorphism group Aut(A), and, for finite A, Aut(A) is a homomorphic image of a subgroup of the characteristic monoid. It follows that in the presence of a (state-) automorphism group G of A, a finite automaton A (and its transformation monoid) always has a decomposition as a divisor of the wreath product of two transformation semigroups whose semigroups are divisors of M(A), namely the symmetry group G and the quotient of M(A) induced by the action of G. Moreover, this division is an embedding if M(A) is transitive on states of A. For more general automorphisms, which may be non-trivial on input letters, counterexamples show that they need not be induced by any corresponding characteristic monoid element. |
| format |
Article |
| author |
Egri-Nagy, A. Nehaniv, C.L. |
| spellingShingle |
Egri-Nagy, A. Nehaniv, C.L. Symmetries of automata Algebra and Discrete Mathematics |
| author_facet |
Egri-Nagy, A. Nehaniv, C.L. |
| author_sort |
Egri-Nagy, A. |
| title |
Symmetries of automata |
| title_short |
Symmetries of automata |
| title_full |
Symmetries of automata |
| title_fullStr |
Symmetries of automata |
| title_full_unstemmed |
Symmetries of automata |
| title_sort |
symmetries of automata |
| publisher |
Інститут прикладної математики і механіки НАН України |
| publishDate |
2015 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/152786 |
| citation_txt |
Symmetries of automata / A. Egri-Nagy, C.L. Nehaniv // Algebra and Discrete Mathematics. — 2015. — Vol. 19, № 1. — С. 48-57. — Бібліогр.: 7 назв. — англ. |
| series |
Algebra and Discrete Mathematics |
| work_keys_str_mv |
AT egrinagya symmetriesofautomata AT nehanivcl symmetriesofautomata |
| first_indexed |
2023-05-20T17:38:26Z |
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2023-05-20T17:38:26Z |
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1796153757046669312 |