如何在行末标记方程式

Question

在行末标记方程式的最简单方法是什么？我遇到过

\标签{eq1}

对于第一个方程等等。有没有更简单的方法？

Answer 1

我在此给出方程编号的一个例子。

\documentclass{article}
\usepackage{amsmath}
\begin{document}

\section{Something}

numbered equation
\begin{equation}
  1=1
\end{equation}

multiline equation alignment
\begin{align}
  x&=1+1\\
   &=2
\end{align}

\section{Another thing\label{zzz}}

numbered equation with \verb|\label|
\begin{equation}
  2=2 \label{twos}
\end{equation}

multiline equation alignment with \verb|\label|
\begin{align}
  x&=1+1 \label{abc}\\
   &=2
\end{align}

You see \verb|\label| has no affect on the printing but is an internal
identifier so we can refer to Section~\ref{zzz} and
equation~(\ref{twos}) or and have the correct number calculated.

\end{document}