TY - JOUR
T1 - A model of random industrial SAT
AU - Barak-Pelleg, D.
AU - Berend, D.
AU - Saunders, J. C.
N1 - Funding Information:
Research supported in part by the Milken Families Foundation Chair in Mathematics.Research supported by an Azrieli Fellowship from the Azrieli Foundation.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/4/2
Y1 - 2022/4/2
N2 - One of the most studied models of SAT is random SAT. In this model, instances are composed from clauses chosen uniformly randomly and independently of each other. This model may be unsatisfactory in that it fails to describe various features of SAT instances, arising in real-world applications. Various modifications have been suggested to define models of industrial SAT. Here, we focus mainly on the aspect of community structure. Namely, here the set of variables consists of a number of disjoint communities, and clauses tend to consist of variables from the same community. Thus, we suggest a model of random industrial SAT, in which the central generalization with respect to random SAT is the additional community structure. There has been a lot of work on the satisfiability threshold of random k-SAT, starting with the calculation of the threshold of 2-SAT, up to the recent result that the threshold exists for sufficiently large k. In this paper, we endeavor to study the satisfiability threshold for the proposed model of random industrial SAT. Our main result is that the threshold in this model tends to be smaller than its counterpart for random SAT. Moreover, under some conditions, this threshold even vanishes.
AB - One of the most studied models of SAT is random SAT. In this model, instances are composed from clauses chosen uniformly randomly and independently of each other. This model may be unsatisfactory in that it fails to describe various features of SAT instances, arising in real-world applications. Various modifications have been suggested to define models of industrial SAT. Here, we focus mainly on the aspect of community structure. Namely, here the set of variables consists of a number of disjoint communities, and clauses tend to consist of variables from the same community. Thus, we suggest a model of random industrial SAT, in which the central generalization with respect to random SAT is the additional community structure. There has been a lot of work on the satisfiability threshold of random k-SAT, starting with the calculation of the threshold of 2-SAT, up to the recent result that the threshold exists for sufficiently large k. In this paper, we endeavor to study the satisfiability threshold for the proposed model of random industrial SAT. Our main result is that the threshold in this model tends to be smaller than its counterpart for random SAT. Moreover, under some conditions, this threshold even vanishes.
KW - Balls and bins problem
KW - Industrial SAT
KW - Random SAT
KW - SAT
KW - Satisfiability threshold
UR - http://www.scopus.com/inward/record.url?scp=85123872786&partnerID=8YFLogxK
U2 - 10.1016/j.tcs.2022.01.038
DO - 10.1016/j.tcs.2022.01.038
M3 - Article
AN - SCOPUS:85123872786
SN - 0304-3975
VL - 910
SP - 91
EP - 112
JO - Theoretical Computer Science
JF - Theoretical Computer Science
ER -