English
The coproduct Monoid ∗ N is equipped with a MulOneClass structure, i.e., a monoid with unit and multiplication.
Русский
Копродуктовый моноид ∗ N оснащён структурой MulOneClass: единицей и умножением.
LaTeX
$$Monoid.Coprod.instMulOneClass M N$$
Lean4
/-- The natural projection `FreeMonoid (M ⊕ N) →* M ∗ N`. -/
@[to_additive /-- The natural projection `FreeAddMonoid (M ⊕ N) →+ AddMonoid.Coprod M N`. -/
]
def mk : FreeMonoid (M ⊕ N) →* M ∗ N :=
Con.mk' _