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I would like to have the convex arc and concave arc above letters as below.

enter image description here

The command \texttoptiebar{d} can produce the second "d". Is there any package that produces both arcs?

Akira
  • 1,215
  • It is possible to use this answer https://tex.stackexchange.com/questions/96680/a-better-notation-to-denote-arcs-for-an-american-high-school-textbook, using the symbol 62 of tipa but I not know the number of slot of the first arc. – Sebastiano Jul 10 '21 at 08:47

2 Answers2

4

You can do

\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}
$\overset{\smile}d(x\mid y)+\overset{\frown}d(x\mid y)+\overline d(x)$
\end{document}

in order to get:

enter image description here

José Carlos Santos
  • 4,803
  • 1
    It is the same of the image of the user. IMHO it is better to use \bar{} instead \overline{} because the bar is shifted much to the left. +1 – Sebastiano Jul 10 '21 at 08:27
3

With amssymb and accents:

\documentclass{article}
\usepackage{amssymb}
\usepackage{accents}

\begin{document}


\[ \accentset{\smallsmile}{d}(x\mid y)) + \accentset{\smallfrown}{d}(x\mid y)) + \bar{d}(x) \]%




\end{document}

enter image description here

Bernard
  • 271,350