Regular Cost Functions over Finite Trees
Regular Cost Functions over Finite Trees
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有限树上的正则成本函数
DOI:
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
Christof Löding
中科院分区:
文献类型:
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作者:
Thomas Colcombet;Christof Löding
We develop the theory of regular cost functions over finite trees: aquantitative extension to the notion of regular languages of trees: Cost functions map each input (tree) to a value in~$\omega+1$, and are considered modulo an equivalence relation which forgets about specific values, but preserves boundedness of functions on all subsets of the domain. We introduce nondeterministic and alternating finite tree cost automata for describing cost functions. We show that all these forms of automata are effectively equivalent. We also provide decision procedures for them. Finally, following B\"uchi's seminal idea, we use cost automata for providing decision procedures for cost monadic logic, a quantitative extension of monadic second order logic.
DOI:
10.1007/978-3-642-02930-1_6
发表时间:
2009
期刊:
影响因子:
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作者:
A. Blumensath;M. Otto;M. Weyer
通讯作者:
M. Weyer