Lifting covers of sofic shifts
Autor: | Paul Trow |
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Rok vydání: | 1998 |
Předmět: | |
Zdroj: | Monatshefte f�r Mathematik. 125:327-342 |
ISSN: | 1436-5081 0026-9255 |
Popis: | We define a class of factor maps between sofic shifts, called lifting maps, which generalize the closing maps. We show that an irreducible sofic shiftS has only finitely manyS-conjugacy classes of minimal left (or right) lifting covers. The number of these classes is a computable conjugacy invariant ofS. Furthermore, every left lifting cover factors through a minimal left lifting cover. |
Databáze: | OpenAIRE |
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