English
The map relations.map is the linear combination map corresponding to the relations, i.e., it sends a generator r to the relation r.
Русский
Отображение relations.map является линейной комбинацией, оно переводит генератор r в отношение r.
LaTeX
$$$\\mathrm{map} : (\\mathrm{R} \\to_A A) \\to_L[A] (\\mathrm{G} \\to_A A)$ and $\\mathrm{map}(\\mathrm{single}\\ r\\ 1) = \\mathrm{relation}(r)$.$$
Lean4
/-- The linear map `(relations.R →₀ A) →ₗ[A] (relations.G →₀ A)` corresponding to the relations
given by `relations : Relations A`. -/
noncomputable def map : (relations.R →₀ A) →ₗ[A] (relations.G →₀ A) :=
Finsupp.linearCombination _ relations.relation