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[helm.git] / helm / software / matita / nlibrary / nat / plus.ma

diff --git a/helm/software/matita/nlibrary/nat/plus.ma b/helm/software/matita/nlibrary/nat/plus.ma
index 809288f2a7bb7d6be2f39ab211811db124164a0b..75268ffcb4336b3ca709e5134dd51ae00c350a88 100644 (file)
--- a/helm/software/matita/nlibrary/nat/plus.ma
+++ b/helm/software/matita/nlibrary/nat/plus.ma
@@ -12,7 +12,7 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "nat/nat.ma".
+include "nat/big_ops.ma".
 include "algebra/unital_magmas.ma".
 include "algebra/abelian_magmas.ma".
 
@@ -50,4 +50,6 @@ ndefinition plus_unital_magma_type: unital_magma_type.
   | napply O
   | #x; napply refl
   | #x; (* qua manca ancora l'hint *) napply (symm plus_abelian_magma_type) ]
-nqed.
\ No newline at end of file
+nqed.
+
+ndefinition big_plus ≝ λn.λf.big_op plus_magma_type n f O.
\ No newline at end of file