%%
%% jverb.styは
%% http://oku.edu.mie-u.ac.jp/~okumura/texfaq/archive/
%% ftp://hayabusa.ics.nara-wu.ac.jp/pub/nide/misc/jverb108.tgz
%% http://www.vector.co.jp/soft/mac/writing/se035452.html
%% から得られます。
%%
\documentclass{jarticle}
\usepackage{amsmath,jverb}
\usepackage{accents}

\newcommand{\bs}{\symbol{'134}}
\newcommand{\Cmd}[1]{{\ttfamily\bs#1}}
\newcommand{\Arg}[1]{{\ttfamily\char"7B}#1{\ttfamily\char"7D}}
\newcommand{\Accent}{{\itshape accent}}
\newcommand{\Symbol}{{\itshape symbol}}
\newcommand{\Symbols}{{\itshape symbols}}

\DeclareMathAccent{\wtilde}{\mathord}{largesymbols}{"65}

\begin{document}

\Cmd{ring}\Arg{\Symbol}


$$
\ring{X} \qquad \mathring{Y}
$$


\Cmd{accentset}\Arg{\Accent}\Arg{\Symbol}

\begin{table}[h]
\begin{center}
\begin{tabular}{| cc | }
\hline 
Command & 表示  \\
\hline
\begin{jverbatim}\accentset{\star}{d}\end{jverbatim}           &$\accentset{\star}{d}$    \\
\begin{jverbatim}\accentset{\diamond}{h}\end{jverbatim}        &$\accentset{\diamond}{h}$ \\
\begin{jverbatim}\accentset{\diamond}{h}\end{jverbatim}        &$\accentset{\diamond}{h}$ \\
\begin{jverbatim}\tilde{\accentset{\circ}{\phi}}\end{jverbatim}&$\tilde{\accentset{\circ}{\phi}}$ \\
\hline
\end{tabular}
\end{center}
\end{table}

\Cmd{dddot}  \Cmd{ddddot}


$$
\dddot{f} \qquad \ddddot{g}
$$


\newpage

\Cmd{underaccent}\Arg{\Accent}\Arg{\Symbol}

\begin{table}[h]
\begin{center}
\begin{tabular}{| cc | }
\hline 
Command & 表示  \\
\hline
\begin{jverbatim}\underaccent{\hat}{x}\end{jverbatim}            &$\underaccent{\hat}{x}$ \\
\begin{jverbatim}\underaccent{\bar}{\gamma}\end{jverbatim}       &$\underaccent{\bar}{\gamma}$ \\
\begin{jverbatim}\underaccent{\triangleright}{q}\end{jverbatim}  &$\underaccent{\triangleright}{q}$ \\
\begin{jverbatim}\underaccent{\tilde}{\mathcal{A}}\end{jverbatim}&$\underaccent{\tilde}{\mathcal{A}}$ \\
\hline
\end{tabular}
\end{center}
\end{table}

%% \DeclareMathAccent{\wtilde}{\mathord}{largesymbols}{"65}


$$
\underaccent{\wtilde}{V}
$$


\Cmd{undertilde}\Arg{\Symbols}


$$
\undertilde{CV}
$$


\end{document}