English
Reiterates that a continuous map induces a continuous morphism in the compactum category.
Русский
Тот же факт: непрерывная карта порождает непрерывный мороморфизм в категории компактумов.
LaTeX
$$$\\text{homOfContinuous}(f, \\text{cont})$$$
Lean4
/-- Any morphism of compacta is continuous. -/
theorem continuous_of_hom {X Y : Compactum} (f : X ⟶ Y) : Continuous f :=
by
rw [continuous_iff_ultrafilter]
intro x g h
rw [Tendsto, ← coe_map]
apply le_nhds_of_str_eq
rw [← str_hom_commute, str_eq_of_le_nhds _ x _]
apply h