Let FCEbe a Galois extension of degree [E : F] = n. Let s be a divisor of n. Let K1,..., K, be all possible intermediate subfields of degree %3D s: [K; : F] = s, Vi = 1, ...,r. Show that the field L = K1 · K2 K, is a normal extension of F.

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ISBN:9780470458365
Author:Erwin Kreyszig
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Let FCEbe a Galois extension of degree [E: F] = n. Let s be a
divisor of n. Let K1,..., K, be all possible intermediate subfields of degree
s:
[K : F] = s, Vi = 1, ... , r.
Show that the field L = K1 · K2 · .· K, is a normal extension of F.
%3D
Transcribed Image Text:Let FCEbe a Galois extension of degree [E: F] = n. Let s be a divisor of n. Let K1,..., K, be all possible intermediate subfields of degree s: [K : F] = s, Vi = 1, ... , r. Show that the field L = K1 · K2 · .· K, is a normal extension of F. %3D
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