X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fnlibrary%2Falgebra%2Fmagmas.ma;h=685d6248059afb3e162ae4ec00ea1304f05318af;hb=63b1b044e54bac3ffecc02ee2941b60f58b0c837;hp=3e4cb942b4c09ba22e4188c3239748a915968fba;hpb=32f2a8f8016b2c6c7fb88189fc0ea0c7f9336555;p=helm.git

diff --git a/helm/software/matita/nlibrary/algebra/magmas.ma b/helm/software/matita/nlibrary/algebra/magmas.ma
index 3e4cb942b..685d62480 100644
--- a/helm/software/matita/nlibrary/algebra/magmas.ma
+++ b/helm/software/matita/nlibrary/algebra/magmas.ma
@@ -16,17 +16,17 @@ include "sets/sets.ma".
 
 nrecord magma_type : Type[1] ≝
  { mtcarr:> setoid;
-   op: binary_morphism mtcarr mtcarr mtcarr
+   op: unary_morphism mtcarr (unary_morph_setoid mtcarr mtcarr)
  }.
 
 nrecord magma (A: magma_type) : Type[1] ≝
- { mcarr:> qpowerclass A;
+ { mcarr:> ext_powerclass A;
    op_closed: ∀x,y. x ∈ mcarr → y ∈ mcarr → op A x y ∈ mcarr
  }.
 
 alias symbol "hint_decl" = "hint_decl_Type2".
 unification hint 0 ≔ 
-  A : ? ⊢ carr1 (qpowerclass_setoid A) ≡ qpowerclass A. 
+  A : ? ⊢ carr1 (ext_powerclass_setoid A) ≡ ext_powerclass A. 
 
 (*
 ncoercion mcarr' : ∀A. ∀M: magma A. carr1 (qpowerclass_setoid (mtcarr A))
@@ -79,7 +79,7 @@ nqed.
 ndefinition m_intersect: ∀A. magma A → magma A → magma A.
  #A; #M1; #M2;
  napply (mk_magma …)
-  [ napply (intersect_ok ? M1 M2)
+  [ napply (intersect_is_ext_morph ? M1 M2)
   | #x; #y; nwhd in ⊢ (% → % → %); *; #Hx1; #Hx2; *; #Hy1; #Hy2;
     napply conj; napply op_closed; nassumption ]
 nqed.
\ No newline at end of file