Question on discriminants

Hi Professor Kim hope you’re doing well. I just had a quick question to do with the notes on lecture 12 on the pdf file, in lecture 12 theres a ‘proof for the theorem’, I was just wandering is this an alternative proof for theorem 106? Or is it part of the same proof but just looking at the Norm of the derivative of the minimal polynomial?

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Reply:

I’m sorry. That portion of the notes is a bit disorganized. You are right that it is just an alternative proof. Thanks for pointing this out.

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