Locality from Circuit Lower Bounds
Locality from Circuit Lower Bounds
复制标题
电路下界的局部性
DOI:
10.1137/110856873
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Luc Segoufin
中科院分区:
文献类型:
--
作者:
Matthew Anderson;Dieter van Melkebeek;Nicole Schweikardt;Luc Segoufin
We study the locality of an extension of first-order logic that captures graph queries computable in ${AC}^0}$, i.e., by families of polynomial-size constant-depth circuits. The extension considers first-order formulas over relational structures which may use arbitrary numerical predicates in such a way that their truth value is independent of the particular interpretation of the numerical predicates. We refer to such formulas as Arb-invariant first-order. We consider the two standard notions of locality, Gaifman and Hanf locality. Our main result gives a Gaifman locality theorem: An Arb-invariant first-order formula cannot distinguish between two tuples that have the same neighborhood up to distance, whererepresents the number of elements in the structure andis a constant depending on the formula. When restricting attention to string structures, we achieve the same quantitative strength for Hanf locality. In both cases we show that our bounds are tight. We also present an application of our results to the study of regular languages. Our proof exploits the close connection between first-order formulas and the complexity class ${AC}^0}$ and hinges on the tight lower bounds for parity on constant-depth circuits.
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DOI:
--
发表时间:
1989
期刊:
International Colloquium on Automata, Languages and Programming
影响因子:
--
作者:
D. Beauquier;J. Pin
通讯作者:
J. Pin
影响因子:
0.6
作者:
M. Otto
通讯作者:
M. Otto
影响因子:
0.6
作者:
T. Schwentick
通讯作者:
T. Schwentick
DOI:
--
发表时间:
2010
期刊:
2010 25th Annual IEEE Symposium on Logic in Computer Science
影响因子:
--
作者:
Nicole Schweikardt;L. Segoufin
通讯作者:
L. Segoufin
DOI:
--
发表时间:
1985
期刊:
IEEE Annual Symposium on Foundations of Computer Science
影响因子:
--
作者:
A. Yao
通讯作者:
A. Yao