# Is there any operator like ⊎, only with a minus sign instead of a plus sign?

I need to use an operator similar to ⊎ in my paper. The required symbol looks like ⊎, only with minus sign instead of a plus sign, inside the "U". I haven't been able to find any symbol for this. Can someone please give me some pointers as to where I can find that symbol?

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Thanks. It worked :) :) –  Badrinath Jayakumar Aug 18 '13 at 19:36

\documentclass{article}
\usepackage{stackengine}
\begin{document}
\stackMath
$\def\stacktype{L}\setstackgap{L}{.4ex} x\mathrel{\stackon{\cup}{\scriptscriptstyle+}}y \mathrel{\stackon{\cup}{\scriptscriptstyle-}}z$
\end{document}


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\usepackage{amsmath}
\makeatletter
\def\moverlay{\mathpalette\mov@rlay}
\def\mov@rlay#1#2{\leavevmode\vtop{%
\baselineskip\z@skip \lineskiplimit-\maxdimen
\ialign{\hfil$\m@th#1##$\hfil\cr#2\crcr}}}
\newcommand{\charfusion}[3][\mathord]{
#1{\ifx#1\mathop\vphantom{#2}\fi
\mathpalette\mov@rlay{#2\cr#3}
}
\ifx#1\mathop\expandafter\displaylimits\fi}
\makeatother

\newcommand{\cupmin}{\charfusion[\mathbin]{\cup}{-}}

$C \cupmin D$


Source Macro

Mathematical symbol for disjoint set union

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