Let E/F be a finite Galois extension. Let Kị and K2 be intermediate fields

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter5: Rings, Integral Domains, And Fields
Section5.2: Integral Domains And Fields
Problem 3TFE: [Type here] True or False Label each of the following statements as either true or false. 3. Every...
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Let E/F be a finite Galois extension. Let Kị and K2 be intermediate fields
Transcribed Image Text:Let E/F be a finite Galois extension. Let Kị and K2 be intermediate fields
between E and F. Let H1 = Gal(E/K1) and H2 = Gal(E/K2). Prove that:
%3D
|H1H2 = [E : K1K2][K¡K2 : K1][K1K2 : K2].
Transcribed Image Text:between E and F. Let H1 = Gal(E/K1) and H2 = Gal(E/K2). Prove that: %3D |H1H2 = [E : K1K2][K¡K2 : K1][K1K2 : K2].
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