matita/matita/contribs/lambdadelta/basic_2/etc_new/ceq_ceq.etc

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  14
  15 include "basic_2/syntax/ceq.ma".
  16
  17 (* CONTEXT-SENSITIVE EQUIVALENCES FOR TERMS *********************************)
  18
  19 (* Main properties **********************************************************)
  20
  21 theorem ceq_trans (L): Transitive … (ceq L).
  22 // qed-.
  23
  24 lemma ceq_canc_sn (L): left_cancellable … (ceq L).
  25 // qed-.
  26
  27 lemma ceq_canc_dx (L): right_cancellable … (ceq L).
  28 // qed-.
  29
  30 theorem cfull_trans (L): Transitive … (cfull L).
  31 // qed-.
  32
  33 lemma cfull_canc_sn (L): left_cancellable … (cfull L).
  34 // qed-.
  35
  36 lemma cfull_canc_dx (L): right_cancellable … (cfull L).
  37 // qed-.