A couple of questions here on meta.physics (namely this one and this one that I could find) already asked for how to use tags on Phys.SE. The answers to these questions seemed to imply that it is not possible to automatically number the equations, like what happens in standard Latex for example with the equation
envinronment.
I asked if this feature is possible on meta, and it turns out that it already exists in MathJax, as you can see from the answer to my question.
Here is an extract from the answer linked above:
This functionality already exists in MathJax. To enable it on an SE site, one would need to include either
equationNumbers: { autoNumber: "AMS" }
or
equationNumbers: { autoNumber: "all" }
in the TeX part of MathJax configuration options. I think the second option would be too aggressive: it would automatically number all displayed formulas in all posts on the site, which would often go against the intent of authors who created some equation numbers manually. The first option is reasonable: it would apply only to the displayed equations entered as AMS-LaTeX environments, e.g.
\begin{equation}
y=x^2
\end{equation}
There aren't that many of those.
So the question now belongs here: should/could this feature be enabled on Phys.SE, to avoid painstakingly renumbering all equations in a post when adding/removing one in the middle of a text and similar things?
I would also think that an automatic numbering of equations by default would be useful as it would allow to easily reference not manually tagged equations posted by the OP, but this is probably not possible now as it would, if I understood correcly, mess up all the already manually numbered equations.