Field automorphism
= Field automorphism
{wiki}
A field automorphism is a bijective <ring homomorphism> from a <field> to itself. The automorphisms fixing a specified subfield form a <Galois group> when the extension is Galois.
= Field automorphism
{wiki}
A field automorphism is a bijective <ring homomorphism> from a <field> to itself. The automorphisms fixing a specified subfield form a <Galois group> when the extension is Galois.