X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fnat%2Fiteration2.ma;h=3a4128e70d4727d81aad445bf59036a715b6511d;hb=e880d6eab5e1700f4a625ddcd7d0fa8f0cce2dcc;hp=752e89b9d02fec375326cd8d8df46b577daaef93;hpb=c445ba5534cccde19016c92660ab52777af221c0;p=helm.git

diff --git a/helm/software/matita/library/nat/iteration2.ma b/helm/software/matita/library/nat/iteration2.ma
index 752e89b9d..3a4128e70 100644
--- a/helm/software/matita/library/nat/iteration2.ma
+++ b/helm/software/matita/library/nat/iteration2.ma
@@ -286,17 +286,16 @@ theorem le_sigma_p:
 (\forall i. i < n \to p i = true \to g1 i \le g2 i ) \to 
 sigma_p n p g1 \le sigma_p n p g2.
 intros.
-generalize in match H.
-elim n
+elim n in H ⊢ %
   [apply le_n.
   |apply (bool_elim ? (p n1));intros
     [rewrite > true_to_sigma_p_Sn
       [rewrite > true_to_sigma_p_Sn in ⊢ (? ? %)
         [apply le_plus
-          [apply H2[apply le_n|assumption]
-          |apply H1.
+          [apply H1[apply le_n|assumption]
+          |apply H.
            intros.
-           apply H2[apply le_S.assumption|assumption]
+           apply H1[apply le_S.assumption|assumption]
           ]
         |assumption
         ]
@@ -304,9 +303,9 @@ elim n
       ]
     |rewrite > false_to_sigma_p_Sn
       [rewrite > false_to_sigma_p_Sn in ⊢ (? ? %)
-        [apply H1.
+        [apply H.
          intros.
-         apply H2[apply le_S.assumption|assumption]
+         apply H1[apply le_S.assumption|assumption]
         |assumption
         ]
       |assumption
@@ -322,25 +321,24 @@ theorem le_sigma_p1:
 bool_to_nat (p1 i)*(g1 i) \le bool_to_nat (p2 i)*g2 i) \to 
 sigma_p n p1 g1 \le sigma_p n p2 g2.
 intros.
-generalize in match H.
-elim n
+elim n in H ⊢ %
   [apply le_n.
   |apply (bool_elim ? (p1 n1));intros
     [apply (bool_elim ? (p2 n1));intros
       [rewrite > true_to_sigma_p_Sn
         [rewrite > true_to_sigma_p_Sn in ⊢ (? ? %)
           [apply le_plus
-            [lapply (H2 n1) as H5
-              [rewrite > H3 in H5.
-               rewrite > H4 in H5.
+            [lapply (H1 n1) as H5
+              [rewrite > H2 in H5.
+               rewrite > H3 in H5.
                simplify in H5.
                rewrite < plus_n_O in H5.
                rewrite < plus_n_O in H5.
                assumption
               |apply le_S_S.apply le_n
               ]
-            |apply H1.intros.
-             apply H2.apply le_S.assumption
+            |apply H.intros.
+             apply H1.apply le_S.assumption
             ]
           |assumption
           ]
@@ -350,16 +348,16 @@ elim n
         [rewrite > false_to_sigma_p_Sn in ⊢ (? ? %)
           [change in ⊢ (? ? %) with (O + sigma_p n1 p2 g2).
            apply le_plus
-            [lapply (H2 n1) as H5
-              [rewrite > H3 in H5.
-               rewrite > H4 in H5.
+            [lapply (H1 n1) as H5
+              [rewrite > H2 in H5.
+               rewrite > H3 in H5.
                simplify in H5.
                rewrite < plus_n_O in H5.
                assumption
               |apply le_S_S.apply le_n
               ]
-            |apply H1.intros.
-             apply H2.apply le_S.assumption
+            |apply H.intros.
+             apply H1.apply le_S.assumption
             ]
           |assumption
           ]
@@ -371,16 +369,16 @@ elim n
         [rewrite > true_to_sigma_p_Sn in ⊢ (? ? %)
           [change in ⊢ (? % ?) with (O + sigma_p n1 p1 g1).
            apply le_plus
-            [lapply (H2 n1) as H5
-              [rewrite > H3 in H5.
-               rewrite > H4 in H5.
+            [lapply (H1 n1) as H5
+              [rewrite > H2 in H5.
+               rewrite > H3 in H5.
                simplify in H5.
                rewrite < plus_n_O in H5.
                assumption
               |apply le_S_S.apply le_n
               ]
-            |apply H1.intros.
-             apply H2.apply le_S.assumption
+            |apply H.intros.
+             apply H1.apply le_S.assumption
             ]
           |assumption
           ]
@@ -388,8 +386,8 @@ elim n
         ]
       |rewrite > false_to_sigma_p_Sn
         [rewrite > false_to_sigma_p_Sn in ⊢ (? ? %)
-          [apply H1.intros.
-           apply H2.apply le_S.assumption
+          [apply H.intros.
+           apply H1.apply le_S.assumption
           |assumption
           ]
         |assumption
@@ -397,7 +395,7 @@ elim n
       ]
     ]
   ]
-qed.    
+qed.
 
 theorem lt_sigma_p: 
 \forall n:nat. \forall p:nat \to bool. \forall g1,g2:nat \to nat.