https://it.wikitolearn.org/Corso:Meccanica_quantistica_(Gasiorowicz)/Prodotto_Tensoriale/Definizione
https://it.wikitolearn.org/Corso:Meccanica_quantistica_(Gasiorowicz)/Atomo_di_idrogeno_reale/Somma_delle_perturbazioni

the temporary solution to the problem has been found to be changing the wikitext to

;Analisi dell'errore
<math display="block">E_k = x_k-1/a</math><math display="block">E_{k+1} = |x_{k+1}-\alpha| = f(x_k)-\alpha = (1-a)x_k+1-1/a</math><math display="block">= x_k-1/a-a x_k+1 = E_kk-a(x_k-1/a) = (1-a) E_k</math>e se <math>|1-a| <1</math> l'errore si riduce.

I deeply and truly thank @davidev for finding the problem!
It seems that he added otherkeywords={self,this} to some option for rendering the code. He promised me a fix during the next days, we hope

Ok, the problem is the math inside the table.

Ok, i found a config that wokrs offline:

Yes, I have done it, but i would like it not to be dependent on the DNS resolution, since it still would make the script dependent on the internet connection, and the problem is not solved

I agree with Luca, but I think that instead dropping the edit button for non-logged use we should leave the edit button and make it redirect to login page, so that it is crystal clear that our page can be modified by logged in user and we do not risk that anyone wonders whether it is possible to edit our content.

This was my fault: I wringly manually replaced

\begin{eqnarray}
|z-z_i| <\delta_i/2,\\
|w-z_i| &=& |w-z+z-z_i| \\
&\leqslant & |w-z| + |z-z_i|  \\
& <& \delta + \delta_i/2 \\
& \leqslant & \delta_i/2 + \delta_i/2  \\
&<& \delta_i.
\end{eqnarray}

with

\begin{align}
|z-z_i| <\delta_i/2,\\
|w-z_i| &=& |w-z+z-z_i| \\
&\leqslant & |w-z| + |z-z_i|  \\
& <& \delta + \delta_i/2 \\
& \leqslant & \delta_i/2 + \delta_i/2  \\
&<& \delta_i.
\end{align}

instead of

\begin{align}
|z-z_i| <\delta_i/2,\\
 |w-z_i| &= |w-z+z-z_i| \nonumber\\
&\leq |w-z| + |z-z_i| \nonumber \\
& < \delta + \delta_i/2 \nonumber\\
& \leq \delta_i/2 + \delta_i/2 \nonumber \\
&< \delta_i.
\end{align}

Are we sure that the content of https://meta.wikitolearn.org/WikiToLearn_Manual cannot be useful for the creation fo the current guide? Has it become completely useless?

During the past moth I and @davidev started working on importing a huge load of courses and we had to deal with what has been decided here.

I'm also pondering if it would make sense to
also create a "keyword policy", to avoid
"exclusive" keywords (in the sense that they
exclude collaboration) such as unipi2016.

5 is nice, but again i stress out that we should not differentiate courses about being created on our platform or being imported.

In T2880#43260, @mte90 wrote:

I added that step in a new paragraph Update MediaWiki http://meta.wikitolearn.org/WikiToLearn_Home/WikitoLearn_Home_Documentation/Local_WikiToLearn_Instance

Thanks do tomaluca help, this has been resolved