op_isTriangulated_iff — Mathlib

English

The statement that F is triangulated is equivalent to its opposite being triangulated.

Русский

Утверждение, что F треугольна, эквивалентно тому, что F.op треугольна.

LaTeX

$$$F.IsTriangulated \iff F.op.IsTriangulated$$$

Lean4

/-- `F` is triangulated if and only if `F.op` is triangulated.
-/
theorem op_isTriangulated_iff : F.op.IsTriangulated ↔ F.IsTriangulated :=
  ⟨fun _ ↦ F.isTriangulated_of_op, fun _ ↦ inferInstance⟩

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