Let KCLCN be fields such that L/K and N/K are both finite normal extensions (note that K is the base field in both extensions). Show that for any 7 E Gal(L/K) there exists some a E Gal(N/K) such = o 1 (You should use the isomorphism extension theorem here and be careful to show how the definitions line up, i.e. that the isomorphism that the theorem gives really is a K-automorphism on N). that

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Let KCLCN be fields such that L/K and N/K are both finite
normal extensions (note that K is the base field in both extensions).
Show that for any 7E Gal(L/K) there exists some o E Gal(N/K) such
that n = o \. (You should use the isomorphism extension theorem
here and be careful to show how the definitions line up, i.e. that the
isomorphism that the theorem gives really is a K-automorphism on N).
Transcribed Image Text:Let KCLCN be fields such that L/K and N/K are both finite normal extensions (note that K is the base field in both extensions). Show that for any 7E Gal(L/K) there exists some o E Gal(N/K) such that n = o \. (You should use the isomorphism extension theorem here and be careful to show how the definitions line up, i.e. that the isomorphism that the theorem gives really is a K-automorphism on N).
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