Complexity of controlled bad sequences over finite sets of Nd

被引:3
|
作者
Balasubramanian, A. R. [1 ]
机构
[1] Tech Univ Munich, Munich, Germany
基金
欧洲研究理事会;
关键词
well-quasi orders; controlled bad sequences; majoring and minoring ordering; ORDINAL RECURSIVE COMPLEXITY; BOUNDS;
D O I
10.1145/3373718.3394753
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
We provide upper and lower bounds for the length of controlled bad sequences over the majoring and the minoring orderings of finite sets of Nd . The results are obtained by bounding the length of such sequences by functions from the Cichon hierarchy. This allows us to translate these results to bounds over the fast-growing complexity classes. The obtained bounds are proven to be tight for the majoring ordering, which solves a problem left open by Abriola, Figueira and Senno (Theor. Comp. Sci, Vol. 603). Finally, we use the results on controlled bad sequences to prove upper bounds for the emptiness problem of some classes of automata.
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页码:130 / 140
页数:11
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