12:13 PM
I see that the post on Mathematics had a bounty:
9

There is somewhat of symmetry in the definition of flat module and pure short exact sequence which can be made precise as follows. Let $\mathcal{R}$ be the class of all right $R$-modules, $\mathcal{S}$ be the class of all short exact sequences of left $R$-modules. For \$\mathcal{A}\subseteq\mathca...

Sorry the bounty didn't help. You could try posting on MO? — Calvin Khor Jun 19 at 6:08
@CalvinKhor Yes I posted it on MO yesterday, but didn’t get any response 😢. Thanks for your concern, though. — Zhenhui Ding Jun 19 at 8:11

3 hours later…
3:02 PM
Any guesses for this year's fields' medals? Someone from our site users?
From here and here, the names prominent are:Maryna Viazovska, June Huh, Hugo-Duminil Copin James Maynard, Karim Adiprasito and Adam Hoffman. Any other names?
Only karim Adiprasito is on our site