5:51 AM
Perhaps somebody knowledgeable in algebraic topology could check whether this edit changing "(S^2) v (S^3)" to "$S^2\times S^3$" at the end of the first paragraph was correct or whether it changed meaning of the post. The relevant part now reads: "to the $4$-skeleton of $S^2\times S^3$, which is $S^2\times S^3$".

2 hours later…

4 hours later…
11:01 AM
I see that a new tag has been created:
29

(This is a restatement of a question asked on the Mathematics.SE, where the solutions were a bit disappointing. I'm hoping that professional mathematicians here might have a better solution.) What are some problems in pure mathematics that require(d) solution techniques from the broadest and ...

Are there perhaps some better tags for that question. Shouldn't at least be added.
If tag is here to stay, probably it would be good to clarify the usage of the tag in the tag-info.
OTOH perhaps the tag will eventually get removed - if a tag is used only on a single question, after few months it is automatically removed. This happened to not too long ago: chat.stackexchange.com/transcript/10243/2017/5/13

3 hours later…
2:24 PM
@MartinSleziak So this seems to be resolved: mathoverflow.net/posts/4502/revisions
in Homotopy Theory, 3 mins ago, by Omar Antolín-Camarena
@MartinSleziak You're right. I changed it to $S^2 \vee S^3$.
in Homotopy Theory, 1 min ago, by Martin Sleziak
@OmarAntolín-Camarena Thanks for doing that. (it's strange that none of the reviewers noticed that. I was a bit hesitant to edit myself, since it's not a topic I am familiar with.)