>>> "JV" == Joseph Vidal-Rosset <joseph@vidal-rosset.net> writes:

> https://lists.gnu.org/archive/html/emacs-orgmode/2019-11/msg00016.html

> Hello,

> I would be glad to apply this patch. But I do not succeed in finding in
> org-mode documentation how applying a patch.

I am confused. This patch has been applied as far as I know at least for
me 

\begin{displaymath}
  \int   f dx =0 
\end{displaymath}

\begin{equation*}
 \sum \alpha_{i}=0
\end{equation*}

Does not generate numbers, does it for you.

You would apply the patch (depending were you are in the org-mode tree)

 patch < 0001-ox-html-Add-equation-numbers-only-for-numbered-envir.patch

And then you need to compile (and install again)




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