matita/matita/contribs/lambdadelta/ground/relocation/pstream_isid.ma

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   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
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  14
  15 include "ground/relocation/rtmap_isid.ma".
  16
  17 (* RELOCATION N-STREAM ******************************************************)
  18
  19 (* Specific inversion lemmas ************************************************)
  20
  21 lemma isid_inv_seq: ∀f,p. 𝐈❪p⨮f❫ → 𝐈❪f❫ ∧ 𝟏 = p.
  22 #f #p #H elim (isid_inv_gen … H) -H
  23 #g #Hg #H elim (push_inv_seq_dx … H) -H /2 width=1 by conj/
  24 qed-.