Parentheses in \overset not working when using breqn

Question

\documentclass{article}
\usepackage{amsmath}
\usepackage{breqn}

\begin{document}
    \begin{math} 
        \overset{.}{()}
    \end{math}
\end{document}

In this example parentheses (even a single one) in \overset together with breqn package throw "undefined control sequence" error when I try to compile it.

Is there any workaround?

Answer 1

You can place the parens in an \hbox.

\documentclass{article}
\usepackage{amsmath}
\usepackage{breqn}
\begin{document}
    \begin{math} 
       {\overset{.}{\hbox{()}}}
    \end{math}
\end{document}

Alternately, you can use a stack, perhaps.

\documentclass{article}
\usepackage{amsmath}
\usepackage{stackengine}
\stackMath
\usepackage{breqn}

\begin{document}
    \begin{math} 
        \stackon[2pt]{()}{\scriptstyle.}
    \end{math}
\end{document}