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Aug 19, 2019 at 21:39 history edited Fedor Petrov CC BY-SA 4.0
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Aug 17, 2019 at 15:01 comment added Peter Mueller Interesting characterization of PSL(2,K) as a subgroup of PGL(2,K) for fields $K$ of characteristic $\ne2$ (I haven't seen that before), and nice finish of the argument!
Aug 17, 2019 at 14:34 history edited Fedor Petrov CC BY-SA 4.0
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Aug 17, 2019 at 14:00 history undeleted Fedor Petrov
Aug 17, 2019 at 14:00 history edited Fedor Petrov CC BY-SA 4.0
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Aug 17, 2019 at 11:39 history deleted Fedor Petrov via Vote
Aug 17, 2019 at 11:22 history edited Fedor Petrov CC BY-SA 4.0
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Aug 17, 2019 at 11:04 history answered Fedor Petrov CC BY-SA 4.0