@csn_intro #X #H1 #H2
elim (cpr_inv_cast1 … H1) -H1
[ * #W0 #T0 #HLW0 #HLT0 #H destruct
- elim (eq_false_inv_tpair … H2) -H2
+ elim (eq_false_inv_tpair_sn … H2) -H2
[ /3 width=3/
| -HLW0 * #H destruct /3 width=1/
]
(* Basic forward lemmas *****************************************************)
-fact csn_fwd_flat2_aux: ∀L,U. L ⊢ ⬇* U → ∀I,V,T. U = ⓕ{I} V. T → L ⊢ ⬇* T.
+fact csn_fwd_flat_dx_aux: ∀L,U. L ⊢ ⬇* U → ∀I,V,T. U = ⓕ{I} V. T → L ⊢ ⬇* T.
#L #U #H elim H -H #U0 #_ #IH #I #V #T #H destruct
@csn_intro #T2 #HLT2 #HT2
@(IH (ⓕ{I} V. T2)) -IH // /2 width=1/ -HLT2 #H destruct /2 width=1/
qed.
(* Basic_1: was: sn3_gen_flat *)
-lemma csn_fwd_flat2: ∀I,L,V,T. L ⊢ ⬇* ⓕ{I} V. T → L ⊢ ⬇* T.
+lemma csn_fwd_flat_dx: ∀I,L,V,T. L ⊢ ⬇* ⓕ{I} V. T → L ⊢ ⬇* T.
/2 width=5/ qed-.
-(*
-sn3/fwd sn3_gen_bind
-sn3/fwd sn3_gen_head
-*)
-
(* Basic_1: removed theorems 3: sn3_gen_cflat sn3_cflat sn3_bind *)