SAT问题也称为合取范式的可满足问题，一个合取范式形如：A1∧A2∧…∧An，子句Ai（1≤i≤n）形如：a1∨a2∨…∨ak，其中，ai称为文字，为某一布尔变量或该布尔变量的非。SAT问题是指：是否存在一组对所有布尔变量的赋值（TRUE或FALSE），使得整个合取范式取值为真。

-SAT problems are also called conjunctive normal form of the satisfiability problem, a conjunctive normal form such as: A1 lambda A2 lambda ... A An, clause Ai (1 i n ) shaped like: A1 V A2 v ... On AK, wherein, AI is known as the text, a boolean variable or the boolean variable non. SAT problem refers to: the existence of a group of all boolean variable assignment ( TRUE or FALSE ), making the entire conjunctive normal form a value of true.