Math & Science ⇒ utilde + array = confusing

[acire]

Hello,

my question is about symbols with an 'undertilde' (\utilde{a}) stacked in an array. utilde in a normal equation looks fine. But as soon as put it in an array, the utilde shifts up with respect to the symbol. In the case of \utilde{a} the tilde is printed over the bottom of the 'a'. Not so nice .

Does anybody have a nice suggestion how to solve this.

grtz from (finally sunny ) the Netherlands,

Erica

[localghost]

Please build a full but minimal example that is compilable as provided.


Thorsten

[acire]

I am sorry. Here is an example:

\documentclass[12pt]{article}
\usepackage{undertilde}
\begin{document}
\begin{equation}
\utilde{a} \utilde{f}
\end{equation}
\begin{equation}
\left[\begin{array}{c}
\utilde{a}\\ \utilde{f}
\end{array}\right]
\end{equation}
\end{document}

In the first equation, the distance between the 'a' and the 'f' is okay.
In the second equation, in the column, the tilde-character distances are charged. How can I control this distance?

many thanks in Advance.

Erica

[localghost]

It works better with the accents package.

Code: Select all

\documentclass[12pt]{article}
\usepackage{accents}

\begin{document}
  \begin{equation}
    \undertilde{a} \undertilde{f}
  \end{equation}
  \begin{equation}
    \left[
    \begin{array}{c}
      \undertilde{a}\\
      \undertilde{f}
    \end{array}
    \right]
  \end{equation}
\end{document}