deletions | additions       diff --git a/subsection_Set_theory_begin_tabular__.tex b/subsection_Set_theory_begin_tabular__.tex  index 0a564e7..437b59f 100644  --- a/subsection_Set_theory_begin_tabular__.tex  +++ b/subsection_Set_theory_begin_tabular__.tex 
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not an element of & \verb!\not\in! & $\not\in$\\  subset of & \verb!\subset! & $\subset$\\  subset of & \verb!\subseteq! & $\subseteq$\\  not a subset of & \verb!\not\subset! & $\not\subset$\\  contains & \verb!\supset! & $\supset$\\  contains & \verb!\supseteq! & $\supseteq$\\  union & \verb!\cup! & $\cup$\\