Math & Science ⇒ equation math environment numberings

[alphaace]

Hi,

When using \equation environment, it starts simply counting my formulas. How would I do it so that it attaches the section number first?

Such as, if I am in section 5.1, the formulas will be counted as

5.1.1
5.1.2
5.1.3
...
5.1.10
5.1.11
...

Thank you for your help!

[gmedina]

Hi,

you can use the \numberwithin command provided by the amsmath package. Take a look at the following simple example:

Code: Select all

\documentclass{report}
\usepackage{amsmath}

\numberwithin{equation}{section}


\begin{document}

\chapter{Test chapter}
\section{Test section}
\begin{equation}
  a=b
\end{equation}

\end{document}