English
Bracket respects integer scalar action: [a • x, m] = a • [x, m] for any integer a.
Русский
Скобка сохраняет целочисленное умножение: [a • x, m] = a • [x, m].
LaTeX
$$$ [a \\cdot x, m] = a \\cdot [x, m] $$$
Lean4
theorem zsmul_lie (a : ℤ) : ⁅a • x, m⁆ = a • ⁅x, m⁆ :=
AddMonoidHom.map_zsmul { toFun := fun x : L => ⁅x, m⁆, map_zero' := zero_lie m, map_add' := fun _ _ => add_lie _ _ _ }
_ _