Welcome to TeX.SX. See if http://tex.stackexchange.com/questions/83531/numbering-equations-with-lyx/85145#85145 helps.
– Torbjørn T.May 11 '13 at 17:38
2
how are equations now entered? if they are entered with \[ ... \] then there are two (not necessarily lyx) ways to get them all numbered: with latex definitions \renewcommand{\[}{\begin{equation}} \renewcommand{\]}{\end{equation}} or by editing to change all \[ to \begin{equation} and all \] to \end{equation}. only \begin{equation} ... \end{equation} generates a number for a displayed equation.
– barbara beetonMay 11 '13 at 17:46
@barbarabeeton LyX uses \[ .. \] for 'standard' displayed math, you have to specify manually if you want numbering, in which case it switches to equation.
– Torbjørn T.May 11 '13 at 17:53
@TorbjørnT. -- thanks. i didn't know that. you should be able to answer this then, if it hasn't already been answered elsewhere.
– barbara beetonMay 11 '13 at 19:32
\[ ... \]then there are two (not necessarily lyx) ways to get them all numbered: with latex definitions\renewcommand{\[}{\begin{equation}} \renewcommand{\]}{\end{equation}}or by editing to change all\[to\begin{equation}and all\]to\end{equation}. only\begin{equation} ... \end{equation}generates a number for a displayed equation. – barbara beeton May 11 '13 at 17:46\[ .. \]for 'standard' displayed math, you have to specify manually if you want numbering, in which case it switches toequation. – Torbjørn T. May 11 '13 at 17:53