latex 显示效果
\emptyset ∅
\in ∈
\notin ∉
\subset ⊂
\supset ⊃
\subseteq ⊆
\nsubseteq ⊈
\nsupseteq ⊉
\nsubseteqq $\nsubseteqq$
\nsupseteqq $\nsupseteqq$
\subsetneq ⊊
\supsetneq ⊋
\subsetneqq ⫋
\supsetneqq ⫌
\varsubsetneq $\varsubsetneq$
\varsupsetneq $\varsupsetneq $
\varsubsetneqq $\varsubsetneqq $
\varsupsetneqq $\varsupsetneqq$
\bigcap ⋂
\bigcup ⋃
\bigvee ⋁
\bigwedge ⋀
\biguplus ⨄
\bigsqcup ⨆
\Subset ⋐
\Supset ⋑
\subseteqq ⫅
\supseteqq ⫆
\sqsubset ⊏
\sqsupset ⊐