Let E be a finite extension of F. Let E=E1,E2,...,Er be all the distinct conjugates of E over F. Prove that the composite K=E1E2...Er is the smallest normal extension of F containing E.
Would anyone know how to attempt this problem/solve it?
Let E be a finite extension of F. Let E=E1,E2,...,Er be all the distinct conjugates of E over F. Prove that the composite K=E1E2...Er is the smallest normal extension of F containing E.
Would anyone know how to attempt this problem/solve it?
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