English
Dualization preserves composition of lattice homomorphisms: dual(g ∘ f) = dual(g) ∘ dual(f).
Русский
Двойственность сохраняет композицию гомоморфизмов решётки.
LaTeX
$$$ \mathrm{LatticeHom.dual}(g \circ f) = (\mathrm{LatticeHom.dual} g) \circ (\mathrm{LatticeHom.dual} f).$$$
Lean4
@[simp]
theorem dual_comp (g : LatticeHom β γ) (f : LatticeHom α β) :
LatticeHom.dual (g.comp f) = (LatticeHom.dual g).comp (LatticeHom.dual f) :=
rfl