Skip to main content
3 events
when toggle format what by license comment
Oct 7, 2020 at 15:38 comment added Wenbo Sun Thanks! By $X\subseteq Y$ I mean that $X$ is a subset of $Y$.
Oct 7, 2020 at 15:30 vote accept Wenbo Sun
Oct 6, 2020 at 16:58 history answered Qiaochu Yuan CC BY-SA 4.0