English
The field equivalence obtained from a B-algebra equivalence via the Hom construction matches the standard field equivalence with K and L.
Русский
Изоморфизм поля, полученный из алгебраического эквивалента через отображение-монодом, совпадает с обычным полевым эквивалентом между K и L.
LaTeX
$$$IsFractionRing.fieldEquivOfAlgEquivHom K L f = IsFractionRing.fieldEquivOfAlgEquiv K L L f$$$
Lean4
/-- An algebra automorphism of a ring induces an algebra automorphism of its fraction field.
This is a bundled version of `fieldEquivOfAlgEquiv`. -/
noncomputable def fieldEquivOfAlgEquivHom : (B ≃ₐ[A] B) →* (L ≃ₐ[K] L)
where
toFun := fieldEquivOfAlgEquiv K L L
map_one' := fieldEquivOfAlgEquiv_refl A B K L
map_mul' f g := fieldEquivOfAlgEquiv_trans K L L L g f