Logical definability of fixed points (Q1114673)
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scientific article; zbMATH DE number 4083599
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Logical definability of fixed points |
scientific article; zbMATH DE number 4083599 |
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Logical definability of fixed points (English)
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1988
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A class of monotonic functions is defined whose least fixed points are weakly definable in the sense of Rabin. The author uses this property to give a new proof that \(\nu\) \(\mu\)-definable sets of trees are recognized by Rabin's special automata.
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system of equations
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tree automaton
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special automaton
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labelled tree
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Büchi set
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\(\nu \) \(\mu\)-definability
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fixed points
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