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4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
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15 include "delayed_updating/unwind3/unwind_structure.ma".
16 include "delayed_updating/substitution/lift_structure.ma".
18 (* UNWIND FOR PATH **********************************************************)
20 (* Constructions with lift **************************************************)
22 lemma pippo (p) (n:pnat) (f):
23 ↑[𝐮❨n❩]▼[⇂*[n]f]p = ▼[𝐮❨n❩∘f]p.
24 #p @(list_ind_rcons … p) -p //
25 #p * [ #m ] #IH #n #f //
30 <depth_d_dx >list_cons_shift <list_append_assoc <unwind_rmap_d_dx
31 /3 width=3 by tr_tls_compose_uni_sn, stream_eq_trans/