Mathematical Foundations of Computer Science 2010
Mathematical Foundations of Computer Science 2010
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计算机科学数学基础 2010
DOI:
10.1007/978-3-642-15155-2_16
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Bodirsky M
中科院分区:
文献类型:
--
作者:
Bodirsky M
We study the complexity of constraint satisfaction problems for templates Γ over the integers where the relations are first-order definable from the successor function. In the case that Γ is locally finite (i.e., the Gaifman graph of Γ has finite degree), we show that Γ is homomorphically equivalent to a structure with one of two classes of polymorphisms (which we call modular max and modular min) and the CSP for Γ can be solved in polynomial time, or Γ is homomorphically equivalent to a finite transitive structure, or the CSP for Γ is NP-complete. Assuming a widely believed conjecture from finite domain constraint satisfaction (we require thetractability conjectureby Bulatov, Jeavons and Krokhin in the special case oftransitivefinite templates), this proves that those CSPs have a complexity dichotomy, that is, are either in P or NP-complete.