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Possible Duplicate:
If a normal $K/F$ has no intermediate extensions, then $\[K : F\]$ is prime

I want an example of: K is a finite extension of F.There is no proper intermediate extensions of K/F. [K:F] is not prime. I do not know about 'discriminant' how to write comments here?.

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    You can't write comments until you have enough points. You can edit your question, instead.2012-02-17
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    http://math.stackexchange.com/a/108622/32172012-02-17

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