Let \(F\) be a field. The prime subfield of \(F\) is the intersection of all subfields of \(F\), that is, the smallest subfield of \(F\) containing \(1\).
Prime subfield
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Let \(F\) be a field. The prime subfield of \(F\) is the intersection of all subfields of \(F\), that is, the smallest subfield of \(F\) containing \(1\).