On the Cardinality of Sets of Infinite Trees Recognizable by Finite Automata
On the Cardinality of Sets of Infinite Trees Recognizable by Finite Automata
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DOI:
10.1007/3-540-54345-7_80
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发表时间:
1991-09
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影响因子:
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通讯作者:
D. Niwinski
中科院分区:
文献类型:
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作者:
D. Niwinski
We show that a Rabin recognizable set of trees is uncountable iff it is of the cardinalitycontinuumiff it contains a non-regular tree. If a Rabin recognizable setL iscountable, it can be represented aswhereMis a regular set of finite terms andt1, ...,tnare regular trees. We also design an algorithm which, given a Rabin automatonA, computes the cardinality of the set of trees recognized byA.