
\overparen - Used to put a (stretchy) over-parenthesis (over-arc, frown) over the argument.
{ \overparen #1}
\overparen command puts a (stretchy) over-parenthesis (over-arc, frown) over the argument.
\overparen a \quad
\overparen ab \quad
\overparen{ab} \quad
\overparen{abc} \quad
\overparen{abcdef} \quad
\overparen{\underparen{abcd}}