9:34 AM
This question was bumped today by a new answer. (Possibly spam answer? But that's not relevant for my question - which is about tags.) Would be a reasonable tag for How do you find out the latest news in fields other than your own?
The question does not explicitly ask for online tools and online resources. Still, I suspect that many answers might be about something available online.
@FrançoisG.Dorais I see that Alexander Chervov did not ping you. So I will add ping instead of him - just to make sure that you do not miss his response here in chat: chat.stackexchange.com/transcript/message/40581610#40581610 (Continuation of the open-problems-list discussion.)

1 hour later…
10:47 AM
BTW the answer I pointed above as possible spam has been deleted. (I was not entirely sure whether to consider it spam or not - so I flagged as naa.)

13 hours later…
11:21 PM
The question Is group cohomology with the inversion action order two? was recently migrated to MO. I have removed the deprecated tag. I was not sure what to add as top-level tag, I wen with . Is it the right choice?
1

Let $\mathbb{Z}^\text{inv}$ denote the $\mathbb{Z}/2$-module defined by the inversion action on $\mathbb{Z}$. Let $G_0$ be a finite group that acts trivially on $\mathbb{Z}^\text{inv}$. Then one can compute via the Künneth Theorem and UCT for cohomology,\begin{align}H^3(G_0\times\mathbb{Z}/2;\mat...