04:23
Now reposted to MathOverflow: Another concept to show that $r(T)\leq \omega(T)$. This answer gives, in my opinion, very reasonable advice about cross-posting. Of course, other discussions about cross-posting might be of interest, too. — Martin Sleziak 18 hours ago
I am not saying that you can't post your question on MathOverflow. But it's customary to link to other copies if you post to multiple sites.
And I see I have added wrong link to that comment - in fact, I wanted to point you to this answer: Moderator Supported (Official) Guidelines for “Legitimate” CrossPosting?.
3 hours later…
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