答案1
这是默认设置ntheorem
:
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fourier, erewhon}
\usepackage{amsmath}
\usepackage[thmmarks, thref]{ntheorem}
\usepackage{cleveref}
\theoremstyle{plain}
\theoremheaderfont{\bfseries\scshape\upshape}%
\theorembodyfont{\itshape}
\theoremseparator{.}
\newtheorem{theorem}{Theorem}[section]
\begin{document}
\section{A first section}
\begin{theorem}[Paramjit]\label{Para}
Hello there I am Paramjit.%
\end{theorem}
This was \cref{Para}.
\end{document}