matita/contribs/PREDICATIVE-TOPOLOGY/class_eq.ma

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  14
  15 (* STATO: NON COMPILA: dev'essere aggiornato *)
  16
  17 set "baseuri" "cic:/matita/PREDICATIVE-TOPOLOGY/class_eq".
  18
  19 include "class_defs.ma".
  20
  21 theorem ceq_trans: \forall C. \xforall c1,c2. ceq C c1 c2 \to
  22                    \xforall c3. ceq ? c2 c3 \to ceq ? c1 c3.
  23 intros.
  24
  25 (*
  26 apply ceq_intro; apply cle_trans; [|auto|auto||auto|auto].
  27 qed.
  28
  29 theorem ceq_sym: \forall C,c1,c2. ceq C c1 c2 \to ceq C c2 c1.
  30 intros; elim H; clear H.; auto.
  31 qed.
  32 *)