English
Smoothness transfers under algebra isomorphisms: if A is smooth over R and e: A ≃ₐ[R] B, then B is smooth over R.
Русский
Гладкость переносится через алгебраические изоморфизмы: если A гладко над R, то и B гладко над R.
LaTeX
$$$[\operatorname{Smooth} R A] \Rightarrow [\operatorname{Smooth} R B] \text{ for } e: A \cong_R B$$$
Lean4
/-- Being smooth is transported via algebra isomorphisms. -/
theorem of_equiv [Smooth R A] (e : A ≃ₐ[R] B) : Smooth R B
where
formallySmooth := FormallySmooth.of_equiv e
finitePresentation := FinitePresentation.equiv e