English
The lattice structure on Regular α is obtained by lifting the lattice structure from α via the Galois insertion.
Русский
Структура решетки на Regular α получается посредством переноса решётки из α через Галуа-вставку.
LaTeX
$$$\mathrm{Lattice}(\mathrm{Regular}(\alpha))\text{ via } \mathrm{gi}$$$
Lean4
@[simp]
theorem map_inv_le_iff (f : F) {a : α} {b : β} : EquivLike.inv f b ≤ a ↔ b ≤ f a :=
by
convert (map_le_map_iff f).symm
exact (EquivLike.right_inv f _).symm