English
The map respects dual embeddings: map f (WithBot.ofDual a) = a.map (ofDual ∘ f) (in the top-augmented setting).
Русский
Отображение поддерживает вложения из двойственной стороны: map f (WithBot.ofDual a) = a.map (ofDual ∘ f).
LaTeX
$$$\\mathrm{WithTop.map}\\ f\\ (\\mathrm{WithBot.ofDual}\\ a) = a.\\mathrm{map}(\\mathrm{ofDual} \\circ f)$$$
Lean4
theorem map_ofDual (f : α → β) (a : WithBot αᵒᵈ) : map f (WithBot.ofDual a) = a.map (ofDual ∘ f) :=
rfl