Prove if K and E be the extension of a field F with [K:F] finite and assume that both K and E are subfields of some larger field. If K is a Galois extension of F then KE is a Glois extension of E and G(KE, E)≅G(K,K∩E).
Prove if K and E be the extension of a field F with [K:F] finite and assume that both K and E are subfields of some larger field. If K is a Galois extension of F then KE is a Glois extension of E and G(KE, E)≅G(K,K∩E).
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Prove if K and E be the extension of a field F with
[K:F] finite and assume that both K and E are
subfields of some larger field. If K is a Galois
extension of F then KE is a Glois extension of
E and G(KE, E)≅G(K,K∩E).
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