研究看点:随机3-SAT中,四阶子句独立在 Ω(n²) 个子句时即可保证高概率不可满足,而三阶独立仍存在几乎总可满足的构造
The problem of identifying the satisfiability threshold of random -SAT formulas has received a lot of attention during the last decades and has inspired the study of other threshold phenomena in random combinatorial structures. The classical assumption in this line of research is that, for a given set of Boolean variables, each clause is drawn uniformly at random among all sets of three literals from these variables, independently from other clauses. Here, we keep the uniform distribution of each clause, but deviate significantly from the independence assumption and consider richer families of probability distributions. For integer parameters , , and , we denote by the family of probability distributions that produce formulas with clauses, each selected uniformly at random from all sets of three literals from the variables, so that the clauses are -wise independent. Our aim is to make general statements about the satisfiability or unsatisfiability of formulas produced by distributions in for different values of the parameters , , and .

生成讲解博客的中文版本

生成AI智能校验的中文版本