(* *)
(**************************************************************************)
+include "ground_2/xoa/ex_3_2.ma".
include "static_2/notation/relations/stareq_2.ma".
include "static_2/syntax/term.ma".
(* Negated inversion lemmas *************************************************)
lemma tneqx_inv_pair: ∀I1,I2,V1,V2,T1,T2.
- (②{I1}V1.T1 ≛ ②{I2}V2.T2 → ⊥) →
+ (②{I1}V1.T1 ≛ ②{I2}V2.T2 → ⊥) →
∨∨ I1 = I2 → ⊥
| (V1 ≛ V2 → ⊥)
| (T1 ≛ T2 → ⊥).