English
For smooth functions from M to R with R a smooth commutative ring, the presheaf is a presheaf of commutative rings.
Русский
Для гладких функций из M в R, R — гладкое коммутативное кольцо, прешеф является прешефом коммутативных колец.
LaTeX
$$smoothPresheafCommRing IM I M R$$
Lean4
/-- The sheaf of smooth functions from `M` to `R`, for `R` a smooth ring, as a sheaf of
rings. -/
def smoothSheafRing : TopCat.Sheaf RingCat.{u} (TopCat.of M) :=
{ val := smoothPresheafRing IM I M R
cond := by
rw [CategoryTheory.Presheaf.isSheaf_iff_isSheaf_forget _ _ (CategoryTheory.forget RingCat)]
exact CategoryTheory.Sheaf.cond (smoothSheaf IM I M R) }