在文档底部添加关键字

Question

我想用\documentclass[12pt,a4paper]{article}代替\documentclass[12pt,reqno]{amsart}。但是我想在第一页的底部添加以下内容

这是我的代码

\documentclass[12pt,a4paper]{report}

 \usepackage{geometry}
 \geometry{left=3cm,right=2cm,top=2.5cm,bottom=2cm}
 \usepackage{setspace}
 \onehalfspacing

\begin{document}

\footnte{2010 Mathematics Subject Classification. Primary ..; Secondary ...}
\end{document}

Answer 1

不使用包：

\documentclass[12pt,a4paper]{report}

 \usepackage{geometry}
 \geometry{left=3cm,right=2cm,top=2.5cm,bottom=2cm}
 \usepackage{setspace}
 \onehalfspacing

% -------------
\makeatletter
\def\keywords{\xdef\@thefnmark{}\@footnotetext}
\makeatother

\begin{document}
    Hello world.%
    \keywords{2010 \emph{Mathematics Subject Classification.} Primary ..; Secondary \dots}%
    \keywords{\emph{Key words and phrases.} Positive Operator \dots}%
    \footnote{Normal footnote}
    Some text here.
\end{document}

Answer 2

附带titlefoot包装：

\documentclass[12pt,a4paper]{report}

 \usepackage{geometry}
 \geometry{left=3cm,right=2cm,top=2.5cm,bottom=2cm}
 \usepackage{setspace}
 \onehalfspacing

 \usepackage{titlefoot}

\begin{document}

\unmarkedfntext{2010 Mathematics Subject Classification. Primary ..; Secondary ...\newline\hspace*{2em}Keywords:}
\end{document}