Let $k$ and $k'$ be subfields of an algebraically closed field $\ell$, and suppose $\sigma: k \mapsto k'$ is an isomorphism of fields. When can $\sigma$ be extended to an automorphism of $\ell$ (upon accepting the axiom of choice) ?
2026-03-30 06:29:07.1774852147
Extending an isomorphism between subfields of an algebraically closed field
29 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in FIELD-THEORY
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