下面证明 NAE-4-SAT 是 NP Complete。 步骤一:证明 NAE-4-SAT 属于 NP 问题 要证明 NAE-4-SAT 属于 NP 问题,需要证明可以在多项式时间内验证一个给定的解是否符合要求。 首先,对于一个给定的解,可以在线性时间内将每个子句中至少有两个真或两个假的变量找出来。然后,检查每个子句中符合要求的变量是否存在,...
It has an important application in many NP-complete problems, such as the SET SPLITTING problem and the MAXCUT problem. An exact algorithm NAE based on Davis-Putnam-Logemann-Loveland (DPLL) for the not-all-equal 3satisfiability (NAE-3SAT) problem is proposed. In the algorithm some new ...
(NAESAT)problemimportant hasan in astheSETSPLITFINGand problem.ItimportantapplicationmanyNP—completeproblems,such problem theMAXCUT exact NAEbasedon thenot— problem.Analgorithm soHle rules to is the newreductionareused all—equal3-satisfiability(NAE-3SAT)problemproposed.Inalgorithm for theformula.The...
(NAESAT)problemimportant hasan in astheSETSPLITFINGand problem.ItimportantapplicationmanyNP—completeproblems,such problem theMAXCUT exact NAEbasedon thenot— problem.Analgorithm soHle rules to is the newreductionareused all—equal3-satisfiability(NAE-3SAT)problemproposed.Inalgorithm for theformula.The...
Sample preparation is the first and very important step, which can greatly influence the repeatability and accuracy of the analysis. To date, several sampl... FQ Yang,SP Li - 《Journal of Pharmaceutical & Biomedical Analysis》 被引量: 97发表: 2008年 Information processing, attention and visual...
It is well-known that read-once resolution is not complete, i.e., there exist unsatisfiable formulas for which no read-once resolution exists. Likewise, the problem of checking if a 3CNF formula has a read-once refutation is NP-complete. This paper is concerned with a variant of ...
In effect, this family is among the most speciose families of freshwater fishes and likely to be one of the largest vertebrate families [3]. The family Cyprinidae also features a relatively high number of endemic species on the Mediterranean slope [2] and its wide biological and ecological ...
Leuciscinae is a subfamily belonging to the Cyprinidae fish family that is widely distributed in Circum-Mediterranean region. Many efforts have been carried out to deciphering the evolutionary history of this group. Thus, different biogeographical scenar