SDPs and Robust Satisfiability of Promise CSP
SDPs and Robust Satisfiability of Promise CSP
复制标题
SDP 和 Promise CSP 的鲁棒可满足性
DOI:
10.1145/3564246.3585180
复制
发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Sandeep, Sai
中科院分区:
文献类型:
--
作者:
Brakensiek, Joshua;Guruswami, Venkatesan;Sandeep, Sai
For a constraint satisfaction problem (CSP), a robust satisfaction algorithm is one that outputs an assignment satisfying most of the constraints on instances that are near-satisfiable. It is known that the CSPs that admit efficient robust satisfaction algorithms are precisely those of bounded width, i.e., CSPs whose satisfiability can be checked by a simple local consistency algorithm (eg., 2-SAT or Horn-SAT in the Boolean case). While the exact satisfiability of a bounded width CSP can be checked by combinatorial algorithms, the robust algorithm is based on rounding a canonical Semi Definite Programming(SDP) relaxation.In this work, we initiate the study of robust satisfaction algorithms for promise CSPs, which are a vast generalization of CSPs that have received much attention recently. The motivation is to extend the theory beyond CSPs, as well as to better understand the power of SDPs. We present robust SDP rounding algorithms under some general conditions, namely the existence of majority or alternating threshold polymorphisms. On the hardness front, we prove that the lack of such polymorphisms makes the PCSP hard for all pairs of symmetric Boolean predicates. Our method involves a novel method to argue SDP gaps via the absence of certain colorings of the sphere, with connections to sphere Ramsey theory.We conjecture that PCSPs with robust satisfaction algorithms are precisely those for which the feasibility of the canonical SDP implies (exact) satisfiability. We also give a precise algebraic condition, known as a minion characterization, of which PCSPs have the latter property.
登录
查看更多内容
DOI:
--
发表时间:
2007
期刊:
Cybersecurity and Cyberforensics Conference
影响因子:
--
作者:
Grant Schoenebeck;Luca Trevisan;Madhur Tulsiani
通讯作者:
Madhur Tulsiani
DOI:
--
发表时间:
2016
期刊:
SIAM journal on computing (Print)
影响因子:
--
作者:
Johan Thapper;Stanislav Živný
通讯作者:
Stanislav Živný
DOI:
--
发表时间:
2018
期刊:
Dagstuhl Reports
影响因子:
--
作者:
Martin Grohe;V. Guruswami;Stanislav Živný
通讯作者:
Stanislav Živný
DOI:
--
发表时间:
2016
期刊:
Logic in Computer Science
影响因子:
--
作者:
Johan Thapper;Stanislav Živný
通讯作者:
Stanislav Živný
DOI:
--
发表时间:
1995
期刊:
Journal of Combinatorial Theory
影响因子:
--
作者:
J. Matoušek;V. Rödl
通讯作者:
V. Rödl