...

diff --git a/helm/software/matita/nlibrary/algebra/magmas.ma b/helm/software/matita/nlibrary/algebra/magmas.ma
index e83c62227f51759973934ee48f30aa70d6974529..3424944bedea48628147f3165766185e2cd531b8 100644 (file)
--- a/helm/software/matita/nlibrary/algebra/magmas.ma
+++ b/helm/software/matita/nlibrary/algebra/magmas.ma
@@ -16,6 +16,6 @@ include "sets/sets.ma".
 
 nrecord magma (A: Type) : Type[1] ≝
  { carr: Ω \sup A;
-   op: A → A → A(*;
-   op_closed: ∀x,y. x ∈ carr → y ∈ carr → op x y ∈ carr*)
+   op: A → A → A;
+   op_closed: ∀x,y. x ∈ carr → y ∈ carr → op x y ∈ carr
  }.
\ No newline at end of file