集合的运算就是用给定的集合去指定新的集合。设A和B是集合，则它们的并差交补集分别定义如下：A∪B={x|x∈A∨x∈B}A∩B={x|x∈A∧x∈B}A – B={x|x∈A∧x不属于 B}SA ={x|x∈(A∪B)∧x 不属于A}SB ={x|x∈(A∪B)∧x 不属于B}-Operation of the collection is to use a given collection to specify the new collection. Let A and B is a collection, and Spread complement sets are defined as follows: A ∪ B = {x | x ∈ A ∨ x ∈ B} A ∩ B = {x | x ∈ A ∧ x ∈ B} A- B = {x | x ∈ A ∧ x does not belong to B} SA = {x | x ∈ (A ∪ B) the ∧ x does not belong to A} SB = {x | x ∈ (A ∪ B) ∧ x does not belong to B }