English
The commutative square in the opposite category associated to a commutative square.
Русский
Коммутативный квадрат в противоположной категории, связанный с данным коммутативным квадратом.
LaTeX
$$theorem op (p : CommSq f g h i) : CommSq i.op h.op g.op f.op$$
Lean4
/-- The commutative square in the opposite category associated to a commutative square. -/
theorem op (p : CommSq f g h i) : CommSq i.op h.op g.op f.op :=
⟨by simp only [← op_comp, p.w]⟩