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10 votes
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What should you do if you find old duplicates?

Sometimes I discover that "old" MO questions are duplicates of even older MO questions. Two examples: Embarrassingly, I found out that my own question: Formula for number of permutations ...
Sam Hopkins's user avatar
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8 votes
0 answers
79 views

Dialog for closure misleading when question has been closed and re-opened

I noticed, when clicking "close" on this question: Breakthroughs in mathematics in 2023, that when a question has been closed and re-opened, and you voted to close it previously, the dialog ...
Sam Hopkins's user avatar
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5 votes
0 answers
202 views

Blocked migration to MathSE

The following MO question Why is $O(n;k)$ not connected, and has four connected components? (revisions/timeline) had the following history had a detailed answer (a) has been closed as off-topic (by ...
YCor's user avatar
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