This package is very helpful when writing math papers.
\usepackage{thmtools}
\usepackage{thm-restate}
%% usage of thm-restate:
\begin{restatable}{thm}{thm:goldbach}
\end{restatable}
Later we recall the theorem: \cref{thm:goldbach}
\goldbach*For more helpful notes, and to steal my LaTeX header files visit this website