@amWhy It's been edited, but no better than before. Anyway it seems you accidentally forgot to close-vote?

[ SmokeDetector | MS ] Mostly non-latin title (83): Let 𝐺={(𝑎,𝑏)|𝑎,𝑏∈ℚ,𝑤𝑖𝑡ℎ 𝑎 𝑎𝑛𝑑 𝑏 𝑛𝑜𝑡 𝑏𝑜𝑡ℎ 𝑍𝑒𝑟𝑜}. An operation ∗ on 𝐺 is defined by (𝑎,𝑏)∗(𝑐,𝑑)=(𝑎𝑐+3𝑏𝑑,𝑎𝑑+𝑏𝑐) by Carolina Richelle on math.SE

[ SmokeDetector | MS ] Link at beginning of body (43): Transformiation of irregular n-gon to regular n-gon through pure construction by Visakh on math.SE

[ SmokeDetector | MS ] Link at beginning of body (43): Transformiation of irregular n-gon to regular n-gon without changing area through pure construction ✏️ by Visakh on math.SE

D, there is a linked question with a very low score, but we have to delete this first.

@TheSimpliFire $\varphi$ looks like a phallus, which clearly demonstrates that mathematics is run by the patriarchy. We should use the much more feminine $\omega$ for the so-called "Golden Ratio" instead.

The number of very low-score posts is currently enjoyable small.

@JoséCarlosSantos Please focus on questions, not users.

close PSQ

@JoséCarlosSantos: how do you write that "close" button thing? It looks stylish.

[tag:close] renders as close

Ah thanks @XanderHenderson. I will use it as and when needed.

D1, D2, D3.

D4, D5, D6.

D7, D8, D9.

D10, D11, D12.

C1, C2, C3.

C4, C5, C6.

C7, C8, C9.

C10, C11, C12.

Handled the big list @user21820!

@ParamanandSingh Like all the D's are deleted?

@XanderHenderson But I find the level of contrast between the dark grey background with black print, in sufficient, and hence, prefer to write what absolutely contrasts with the background.

Please consider a deletion vote on this meta post which seeks moderator action, and hence was closed

@amWhy: gave a delete on meta question as well as on all those in list of user21820

@ParamanandSingh Gracias (Thank you!)

I went through all the D's and it seems @JoséCarlosSantos sealed the fate with a third delete vote.

@amWhy An alternative is [meta-tag:close] which renders as close

@MartinR: the contrast for this close button is better on my android device.

close I am out of closing votes. Can you please close this question as a duplicate of this one?

Are you sure you got the right target and duplicate?

Just because the target question happens to be about a set that satisfies the "dupe's requirements", but is not in anyway, the same question, the initial question should be designated a dupe of an altogether different question, @JoséCarlosSantos?

@amWhy This answer answers the question.

@JoséCarlosSantos I saw that it does, but I doubt the OP will understand that it does, and I'm hesitant to close it as a dupe of the target question, because that was a distinctly different question, as I see it. I can be convinced, in that I'm not "standing my ground"

I do see the "target" you linked as helpful and related, but nothing there explicitly says "this subset of $\mathbb Q$ is both open and closed."

This is a PSQ answered by four users within 7 minutes!!