A finer reduction of constraint problems to digraphs
A finer reduction of constraint problems to digraphs
复制标题
将约束问题更好地简化为有向图
DOI:
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复制
发表时间:
2014
期刊:
影响因子:
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通讯作者:
T. Niven
中科院分区:
文献类型:
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作者:
Jakub Bulín;D. Delic;M. Jackson;T. Niven
It is well known that the constraint satisfaction problem over a general relational structure A is polynomial time equivalent to the constraint problem over some associated digraph. We present a variant of this construction and show that the corresponding constraint satisfaction problem is logspace equivalent to that over A. Moreover, we show that almost all of the commonly encountered polymorphism properties are held equivalently on the A and the constructed digraph. As a consequence, the Algebraic CSP dichotomy conjecture as well as the conjectures characterizing CSPs solvable in logspace and in nondeterministic logspace are equivalent to their restriction to digraphs.
DOI:
10.1137/100811258
发表时间:
2010-03
期刊:
SIAM J. Comput.
影响因子:
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作者:
M. Dyer;David Richerby
通讯作者:
M. Dyer;David Richerby
影响因子:
1.6
作者:
Cohen D
通讯作者:
Cohen D
DOI:
10.1109/focs.2015.80
发表时间:
2015
期刊:
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影响因子:
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作者:
Kolmogorov V
通讯作者:
Kolmogorov V