English
Integer scalar action on quotient by a subtraction-friendly structure.
Русский
Целочисленное скалярное действие на факторе в контексте группы вычитания.
LaTeX
$$$\\mathbb{Z}$-smul on $c.Quotient$$$
Lean4
/-- The integer scaling induced on the quotient by a congruence relation on a type with a
subtraction. -/
instance _root_.AddCon.Quotient.zsmul {M : Type*} [AddGroup M] (c : AddCon M) : SMul ℤ c.Quotient :=
⟨fun z => (Quotient.map' (z • ·)) fun _ _ => c.zsmul z⟩