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|Title:||Automatic linear orders and trees||Authors:||Khoussainov, B.
|Issue Date:||2005||Citation:||Khoussainov, B.,Rubin, S.,Stephan, F. (2005). Automatic linear orders and trees. ACM Transactions on Computational Logic 6 (4) : 675-700. ScholarBank@NUS Repository. https://doi.org/10.1145/1094622.1094625||Abstract:||We investigate partial orders that are computable, in a precise sense, by finite automata. Our emphasis is on trees and linear orders. We study the relationship between automatic linear orders and trees in terms of rank functions that are related to Cantor-Bendixson rank. We prove that automatic linear orders and automatic trees have finite rank. As an application we provide a procedure for deciding the isomorphism problem for automatic ordinals. We also investigate the complexity and definability of infinite paths in automatic trees. In particular, we show that every infinite path in an automatic tree with countably many infinite paths is a regular language. © 2005 ACM.||Source Title:||ACM Transactions on Computational Logic||URI:||http://scholarbank.nus.edu.sg/handle/10635/40491||ISSN:||15293785||DOI:||10.1145/1094622.1094625|
|Appears in Collections:||Staff Publications|
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