[Tex/LaTex] Letter with circle above — not a dot — in math mode

math-modestacking-symbols

I need to typeset letter with a circle above it in math. \dot A does a very close result, but I need something that looks like \circ, not like \cdot.

Edit: there is awesome answer here, but Detexify failed for me, and I tried looking up tables, but haven't found what I needed.

Best Answer

Use \overset{\circ}{X} or \mathring{X} for letter X say

Related Solutions

[Tex/LaTex] How to put a symbol inside another in math mode

This could be a starter using \kern and \raisebox. You may experiment with the dimensions:

\documentclass[12pt]{article}
\newcommand*{\xV}{{\large V}\kern-0.55em\raisebox{1.4ex}{\tiny x}}
\begin{document}
\xV
\end{document}

enter image description here

[Tex/LaTex] Arrow accented with a dot (natural transformation)

This is similar to Mico's, but doesn't use \ooalign, since an approach without overlapping rules seems better:

\documentclass{article}
\usepackage{amsmath}
\usepackage{graphicx}
\newcommand{\naturalto}{%
  \mathrel{\vbox{\offinterlineskip
    \mathsurround=0pt
    \ialign{\hfil##\hfil\cr
      \normalfont\scalebox{1.2}{.}\cr
%      \noalign{\kern-.05ex}
      $\longrightarrow$\cr}
  }}%
}
\begin{document}
$F\naturalto G\overset{\text{\normalsize.}}\longrightarrow H$
\end{document}

This won't scale in sub/superscripts, but I can't see this as a real limitation. The commented line shows where to act for raising or lowering the dot. The second arrow is just for comparison.