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3 events
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Mar 30, 2018 at 0:47 comment added Tito Piezas III Perhaps we can surmise that 3 is exceptional since the j-invariant vanishes at $j\big(\tfrac{1+\sqrt{-3}}{2}\big)=0$. I've also come across some results in class field theory where it is required that $3 \nmid d$.
Mar 29, 2018 at 18:31 history edited Stopple CC BY-SA 3.0
corrected lsit of discriminants
Mar 29, 2018 at 15:29 history answered Stopple CC BY-SA 3.0