added definition of f_equal1. I think this file should not be inside the matita library!

once cercions from /\ to eq will be committed the definition should be replaced by two
coercion statement (that will generate the composite)

diff --git a/helm/software/matita/library/legacy/coq.ma b/helm/software/matita/library/legacy/coq.ma
index e7a5615d9c633dac55f120e08376fc219e5597cc..8669d1ef7e0715cbe602ea0465df1701a01bed03 100644 (file)
--- a/helm/software/matita/library/legacy/coq.ma
+++ b/helm/software/matita/library/legacy/coq.ma
@@ -19,7 +19,9 @@ default "equality"
  cic:/Coq/Init/Logic/sym_eq.con
  cic:/Coq/Init/Logic/trans_eq.con
  cic:/Coq/Init/Logic/eq_ind.con
- cic:/Coq/Init/Logic/eq_ind_r.con. 
+ cic:/Coq/Init/Logic/eq_ind_r.con 
+ cic:/Coq/Init/Logic/f_equal.con 
+ cic:/Coq/Init/Logic/f_equal1.con. 
 
 default "true"
  cic:/Coq/Init/Logic/True.ind. 
@@ -74,3 +76,9 @@ interpretation "Coq's natural 'not less or equal than'"
  'nleq x y = (cic:/Coq/Init/Logic/not.con 
                (cic:/Coq/Init/Peano/le.ind#xpointer(1/1) x y)).
 
+theorem f_equal1 : 
+  \forall A,B:Type. \forall f:A \to B. \forall x,y:A.
+  x = y \to f y = f x.
+  intros.elim H.reflexivity.
+qed.
+