Say I have written a theorem and named it as Theorem 1.
Now, when I use this theorem I will write that: This follows from Theorem 1.
Now consider this scenario. Say, I added a new theorem before theorem 1. So now, what used to be Theorem 1, has become Theorem 2. Consequently, I have to change this sentence "This follows from Theorem 1." to This follows from Theorem 2."
I want to avoid this problem. How to do this ?
Please keep in mind that I am a beginner.
The whole point in latex is, that you don't have to manually write such things. Instead you can give the theorem a \label. See the following short example:
\documentclass{article}
\newtheorem{theorem}{Theorem}[section]
\begin{document}
\section{Introduction}
\begin{theorem}
Let ... \label{test}
\end{theorem}
\ref{test}
\end{document}
This gets even more comfortabel with packages such as \cleveref:
\documentclass{article}
\newtheorem{theorem}{Theorem}[section]
\usepackage{cleveref}
\begin{document}
\section{Introduction}
\begin{theorem}
Let ... \label{test}
\end{theorem}
\ref{test}
\cref{test}
\end{document}
