原文链接:http://tex.stackexchange.com/questions/15984/what-symbol-should-one-use-for-a-set-complement

示例:

\documentclass{minimal}     \usepackage{amsmath}    \usepackage{amssymb} 

\newcommand{\eqn} {\[ 

      \stcomp{(A \cup B)} = \stcomp{A} \cap \stcomp{B} 

\]} 

\begin{document} 

\newcommand{\stcomp}[1]{{#1}^\complement}  \eqn 

\renewcommand{\stcomp}[1]{\overline{#1}}           \eqn 

\renewcommand{\stcomp}[1]{{#1'}}           \eqn 

\renewcommand{\stcomp}[1]{\widetilde{#1}}           \eqn 

\renewcommand{\stcomp}[1]{{#1}^{\sim}}           \eqn 

\renewcommand{\stcomp}[1]{{#1}^{\mathsf{c}}}           \eqn 

\renewcommand{\stcomp}[1]{X\setminus{#1}}           \eqn 

\end{document}

http://i.stack.imgur.com/CA8ms.png

Of all of these I've used ^\complement the most, and the overbar is the one I've seen the most. I have to say I really like your ^\mathsf{c} implementation.