Let be the automorphism of Q() that maps onto -. a. Describe the fixed field
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Let σ be the automorphism of Q(π) that maps π onto -π.
a. Describe the fixed field of σ.
b. Describe all extensions of σ to an isomorphism mapping the field Q(√π) onto a subfield of Q̅(π)̅
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a The fixed field of is the subfield of Q that is left unc...View the full answer
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