$\begin{array}{|c|c|} \hline U\ T & S \cup T \\ \hline I\ T & S \cap T \\ \hline D\ T & S - T \\ \hline C\ T & T - S \\ \hline S\ T & S \oplus T \\ \hline\end{array}$
基本集合运算如下:
$\begin{array}{|c|c|} \hline A \cup B & \{x|x\in A\ \text{or}\ x \in B \} \\ \hline A \cap B & \{x|x\in A\ \text{and}\ x \in B \} \\ \hline A - B & \{x|x\in A\ \text{and}\ x \notin B \} \\ \hline A \oplus B & (A-B)\cup(B-A) \\ \hline \end{array}$