some_mem_insertTop — Mathlib

English

The uIcc interval in the product factors as a product of component intervals: uIcc(x,y) = sprod(uIcc(x1,y1), uIcc(x2,y2)).

Русский

Интервал uIcc в произведении распадается на произведение компонент: uIcc(x,y) = sprod(uIcc(x1,y1), uIcc(x2,y2)).

LaTeX

$$$ uIcc\,(x,y) = uIcc\,(x.1,y.1) \times\! uIcc\,(x.2,y.2) $$$

Lean4

@[simp]
theorem some_mem_insertTop {s : Finset α} {a : α} : ↑a ∈ insertTop s ↔ a ∈ s := by simp [insertTop]

Похожие утверждения