English
If q is uniform, then the support of the mapped x by g is the image of the support by g on each coordinate.
Русский
Если q однороден, то опора отображенного x через g равна образу опоры через g по каждой координате.
LaTeX
$$$$ \\mathrm{supp}(g<$$>x)\\;i = g i'' \\mathrm{supp}\ x\\;i. $$$$
Lean4
theorem supp_map (h : q.IsUniform) {α β : TypeVec n} (g : α ⟹ β) (x : F α) (i) : supp (g <$$> x) i = g i '' supp x i :=
by
rw [← abs_repr x]; obtain ⟨a, f⟩ := repr x; rw [← abs_map, MvPFunctor.map_eq]
rw [supp_eq_of_isUniform h, supp_eq_of_isUniform h, ← image_comp]
rfl