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Revision difference : Galois criterion for solvability of a polynomial by radicals
Version 2 Version 1
Let $f \in F[x]$ be a polynomial over a field $F$, and let $K$ be its splitting field. Then $K$ is a radical extension if and only if the Galois group $\operatorname{Gal}(K/F)$ is a solvable group. Let $f \in F[x]$ be a polynomial over a field $F$, and let $K$ be its splitting field. Then $K$ is a radical extension if and only if the Galois group $\operatorname{Gal}(K/F)$ is a solvable group.