11

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

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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}
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3
4

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}
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1
  • 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 2 '12 at 15:33
1

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.

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