您可以尝试:
\documentclass{article}
\usepackage{nomencl}
\makenomenclature
\begin{document}
\centering\renewcommand{\nomname}{List of Symbols
\hfill
\hline
\smallskip
\hline
\hfill
}
\nomenclature{A(T_{n})}{Alternate triangular snake}
\printnomenclature
\end{document}
![在此处输入图片描述](https://i.stack.imgur.com/Jeo35.png)