Theorem: Pos.le_antisymm (Extra/Pos/Lemmas.lean)

State before:
x y : Pos
⊢ x ≤ y → y ≤ x → x = y
Tactic:
by_toNat
State after:
x y : Pos
⊢ y.toNat ≥ x.toNat → x.toNat ≥ y.toNat → x.toNat = y.toNat

State before:
x y : Pos
⊢ y.toNat ≥ x.toNat → x.toNat ≥ y.toNat → x.toNat = y.toNat
Tactic:
exact Nat.le_antisymm
State after:
no goals