RingPreordering.isOrdering_iff

∀ {R : Type u_1} [inst : CommRing R] {P : RingPreordering R}, P.IsOrdering ↔ ∀ (a b : R), -(a * b) ∈ P → a ∈ P ∨ b ∈ P

Defined in: Mathlib.Algebra.Order.Ring.Ordering.Basic
Cited by: 0 results in Mathlib
Foundations: Depth 28 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: CommRing

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