如何创建一个\biguminus
类似于的符号\biguplus
,只是用减号代替加号?
答案1
您可以使用\ooalign
。
\documentclass{article}
\usepackage{amsmath}
\makeatletter
\newcommand*\biguminus{\mathop{\mathpalette\@biguoperator{-}}}
\newcommand*\bigutimes{\mathop{\mathpalette\@biguoperator{\times}}}
\newcommand*\bigucdot{\mathop{\mathpalette\@biguoperator{\cdot}}}
\newcommand*\@biguoperator[2]{\ooalign{\hidewidth$#1\m@th#2$\hidewidth\cr$#1\m@th\bigcup$\cr}}
\makeatother
\begin{document}
\[
\biguplus_{\biguplus_{\biguplus}}
\biguminus_{\biguminus_{\biguminus}}
\bigutimes_{\bigutimes_{\bigutimes}}
\bigucdot_{\bigucdot_{\bigucdot}}
\]
\end{document}