English
There is an R-algebra homomorphism from R[X] to AdjoinRoot f sending X to the root of f, i.e., mkₐ f : R[X] →ₐ[R] AdjoinRoot f.
Русский
Существует R-алгеброомех-from R[X] в AdjoinRoot f, отправляющий X в корень f; mkₐ f : R[X] →ₐ[R] AdjoinRoot f.
LaTeX
$$$mk_\\!a_f : R[X] \\to_{{R}} AdjoinRoot f$$$
Lean4
/-- `R`-algebra homomorphism from `R[x]` to `AdjoinRoot f` sending `X` to the `root`. -/
def mkₐ : R[X] →ₐ[R] AdjoinRoot f :=
Ideal.Quotient.mkₐ R _