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Dec 15, 2017 at 14:55 comment added Raymond Cheng @htzou: You're right in that I previously botched the expression for $L$ and included too many generators there. I have fixed that, together with many other typos. I have tried to explain a little more, so hopefully it is clearer now!
Dec 15, 2017 at 14:53 history edited Raymond Cheng CC BY-SA 3.0
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Dec 15, 2017 at 14:35 history edited Raymond Cheng CC BY-SA 3.0
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Dec 15, 2017 at 10:01 comment added ht zou But $L$ is not purely transcendental extension of $k$ with such generators since $y_1, y_2, \cdots ,y_{2r-2}$ are related to $s,t$.
Dec 14, 2017 at 3:01 vote accept ht zou
Dec 15, 2017 at 9:57
Dec 13, 2017 at 18:27 review First posts
Dec 13, 2017 at 18:29
Dec 13, 2017 at 18:26 history answered Raymond Cheng CC BY-SA 3.0