matita/matita/contribs/lambdadelta/delayed_updating/syntax/prototerm_proper_inner.ma

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  14
  15 include "delayed_updating/syntax/prototerm_proper.ma".
  16 include "delayed_updating/syntax/path_inner_proper.ma".
  17 include "ground/lib/subset_overlap.ma".
  18
  19 (* PROPER CONDITION FOR PROTOTERM *******************************************)
  20
  21 (* Constructions with inner condition for prototerm *************************)
  22
  23 lemma term_proper_outer (t):
  24       t ⧸≬ 𝐈 → t ϵ 𝐏.
  25 /4 width=3 by path_des_outer_proper, subset_ol_i/
  26 qed.