helm/matita/tests/change.ma

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  14
  15 set "baseuri" "cic:/matita/tests/change/".
  16 alias num (instance 0) = "natural number".
  17 alias symbol "eq" (instance 0) = "Coq's leibnitz's equality".
  18 alias symbol "plus" (instance 0) = "Coq's natural plus".
  19 alias id "nat" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1)".
  20
  21 theorem stupid:
  22   \forall a:nat.
  23   a = 5 \to
  24   (3 + 2) = a.
  25 intros.
  26 change in \vdash (? ? % ?) with 5.
  27 rewrite < H in \vdash (? ? % ?).
  28 reflexivity.
  29 qed.