I have recently flagged the question, which was helpful. So i thought the question will be delete. But it still there.
So what is rules for that?
Cross-posting is highly discouraged, so thank you for bringing it to our attention.
If the question were more appropriate for Math.SE, I would have closed our version. I think it's most appropriate on Chem, so I let it stand. I did not follow up with Math.SE to see if their version was closed.
The flag was helpful, so it was marked as such. Flagging doesn't guarantee that there will be any action taken by the moderators.