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Sep 16, 2016 at 15:54 history edited Jim Humphreys CC BY-SA 3.0
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Sep 15, 2016 at 6:11 comment added Jia-jun Ma I am curious about how Spaltenstein verify/construe such kind of diagrams? What's the algorithm to check $O_1 \subset \overline{O_2}$ without knowing the Hasse diagram a priori?
Jan 8, 2015 at 10:02 vote accept Paul Levy
Jan 7, 2015 at 20:12 history edited Jim Humphreys CC BY-SA 3.0
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Jan 7, 2015 at 17:43 history answered Jim Humphreys CC BY-SA 3.0