English
Multiplication by a constant on the left preserves identical distribution when f,g are identically distributed.
Русский
Умножение слева на константу сохраняет одинаковое распределение при равенстве f и g по распределению.
LaTeX
$$$\forall c,\ \text{IdentDistrib } f g\ \mu\ nu \Rightarrow \text{IdentDistrib}(x \mapsto c \cdot f(x)) (x \mapsto c \cdot g(x)) \mu \nu$$$
Lean4
@[to_additive]
theorem div_const [Div γ] [MeasurableDiv γ] (h : IdentDistrib f g μ ν) (c : γ) :
IdentDistrib (fun x => f x / c) (fun x => g x / c) μ ν :=
h.comp (MeasurableDiv.measurable_div_const c)