English
The join of the ranges of inl and inr equals the whole coproduct in terms of MonoidHommrange.
Русский
Слияние образов inl и inr равно всему копродукту по образам мрэнджа.
LaTeX
$$$\operatorname{mrange}(\mathrm{inl}) \sqcup \operatorname{mrange}(\mathrm{inr}) = \top$$$
Lean4
@[to_additive (attr := simp)]
theorem mrange_inl_sup_mrange_inr : MonoidHom.mrange (inl : M →* M ∗ N) ⊔ MonoidHom.mrange (inr : N →* M ∗ N) = ⊤ := by
rw [← mclosure_range_inl_union_inr, Submonoid.closure_union, ← MonoidHom.coe_mrange, ← MonoidHom.coe_mrange,
Submonoid.closure_eq, Submonoid.closure_eq]