[Tex/LaTex] Wide inverted breve overset

accentsmath-modestacking-symbolssymbolstypography

I want an inverted breve that spans the width of two symbols rather than one.

I have tried the suggestions in:
inverted breve accent in math mode , and in
How to put \smallsmile or \smallfrown on top of a letter.

But these were meant for inverted breve oversets that only span the width of one symbol.

Those suggestions give the top result below, whereas what I want is the bottom result below:

enter image description here

What is the best way to do this ?

Best Answer

You can use yhmath:

\documentclass{article}
\usepackage{yhmath}
\begin{document}
$\wideparen{\Delta k}+\wideparen{x+y+z}$
\end{document}

enter image description here

This changes the math extension symbol font, so you may not want to do it; in this case you can just import the needed math accent

\documentclass{article}

\DeclareSymbolFont{YHlargesymbols}{OMX}{yhex}{m}{n}
\DeclareMathAccent{\wideparen}{\mathord}{YHlargesymbols}{"F3}

\begin{document}
$\wideparen{\Delta k}+\wideparen{x+y+z}$
\end{document}
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