13

I'm trying to find the equivalent to \d (or \textsubdot) for the math mode.

N.N.
  • 36,163
Dejan
  • 1,562

3 Answers3

14

You can use the \underaccent command from the accents package. Something along these lines:

\documentclass{article}
\usepackage{amsmath}
\usepackage{accents}

\newcommand*\underdot[1]{%
  \underaccent{\dot}{#1}}

\begin{document}
$\underdot{A}$
\end{document}
Gonzalo Medina
  • 505,128
  • But be aware of this annoying issue: https://tex.stackexchange.com/questions/176273/when-using-the-accents-package-underaccent-greek-symbol-in-caption-of-a-table-g – Darko Veberic Jul 12 '20 at 19:42
5

It's not in the TeX Book. If you don't mind cheating you could try the following but it's not nice:

\documentclass{minimal}
\usepackage{amsmath}

\def\myd#1{\text{\d{\ensuremath#1}}}
\begin{document}
$\myd{a}$
\end{document}
  • 3
    Understandably this is a minimal working example. However, rather use a documentclass other than minimal (like article, say). I think \ensuremath here is a bit much, since you want the contents of \myd to be in math mode always. As such, rather use \d{$#1$} - just a suggestion. – Werner Jan 02 '12 at 15:33
2

Excuse me for this old answer..but it is possibile to use also this code to get the dot under a symbol or a character.

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath,amssymb}

\begin{document}
\d{o}, \d{$\alpha$}, \d{$\xi$}, \d{$\epsilon$}
\end{document}

enter image description here

For the \xi symbol it is not very good.

Sebastiano
  • 54,118