The Power of Sherali-Adams Relaxations for General-Valued CSPs
The Power of Sherali-Adams Relaxations for General-Valued CSPs
复制标题
Sherali-Adams 放宽对于普通价值 CSP 的作用
DOI:
--
复制
发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Stanislav Živný
中科院分区:
文献类型:
--
作者:
Johan Thapper;Stanislav Živný
We give a precise algebraic characterization of the power of Sherali--Adams relaxations for solvability of valued constraint satisfaction problems (CSPs) to optimality. The condition is that of bounded width, which has already been shown to capture the power of local consistency methods for decision CSPs and the power of semidefinite programming for robust approximation of CSPs. Our characterization has several algorithmic and complexity consequences. On the algorithmic side, we show that several novel and well-known valued constraint languages are tractable via the third level of the Sherali--Adams relaxation. For the known languages, this is a significantly simpler algorithm than those previously obtained. On the complexity side, we obtain a dichotomy theorem for valued constraint languages that can express an injective unary function. This implies a simple proof of the dichotomy theorem for conservative valued constraint languages established by Kolmogorov and Živný [J. ACM, 60 (2013), 10], and also a ...
登录
查看更多内容
影响因子:
1.6
作者:
Cohen D
通讯作者:
Cohen D
影响因子:
1.6
作者:
Huber A
通讯作者:
Huber A
DOI:
10.48550/arxiv.1507.01776
发表时间:
2015
期刊:
arXiv e-prints
影响因子:
--
作者:
Powell Robert
通讯作者:
Powell Robert
DOI:
10.1109/focs.2015.80
发表时间:
2015
期刊:
--
影响因子:
--
作者:
Kolmogorov V
通讯作者:
Kolmogorov V
DOI:
--
发表时间:
2015
期刊:
--
影响因子:
--
作者:
Cohen D.A.
通讯作者:
Cohen D.A.