\psshadowbox 的问题

Question

为什么这不起作用？我想我已经获得了我需要的所有包，并且我已经从http://tug.org/pracjourn/2008-3/morales/morales.pdf。

\documentclass[landscape,a0paper,final]{a0poster}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{fullpage}
\usepackage[czech]{babel}
\usepackage{graphicx}
\usepackage{pstricks,pst-grad}
\usepackage{amsthm}

\begin{document}
\psshadowbox[linewidth=1mm,framearc=0.1,linecolor=red,framesep=1em]{
\begin{minipage}[h]{0.5\linewidth}
{\bf Fermat’s last theorem}
If an integer $n$ is greater than $2$, then the equation
$$ a^n+b^n=c^n $$
has no solutions in non-zero integers $a$, $b$, and $c$.
\end{minipage}}
\end{document}

Answer 1

运行以下命令xelatex：

\documentclass[landscape,a0paper,final]{a0poster}
\usepackage{fontspec}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{fullpage}
\usepackage[czech]{babel}
\usepackage{graphicx}
\usepackage{pstricks,pst-grad}
\usepackage{amsthm}

\begin{document}
\psshadowbox[linewidth=1mm,framearc=0.1,linecolor=red,framesep=1em]{%
\begin{minipage}[h]{0.5\linewidth}
{\bf Fermat’s last theorem}
If an integer $n$ is greater than $2$, then the equation
$$ a^n+b^n=c^n $$
has no solutions in non-zero integers $a$, $b$, and $c$.
\end{minipage}}
\end{document}