better names in a lemma to increase readability

diff --git a/helm/software/matita/contribs/dama/dama/lebesgue.ma b/helm/software/matita/contribs/dama/dama/lebesgue.ma
index 46fe6e4223afa0136c19bed8423339b88308758c..dcf59e2aa57d5406905eab3d2cf1b56008589ad3 100644 (file)
--- a/helm/software/matita/contribs/dama/dama/lebesgue.ma
+++ b/helm/software/matita/contribs/dama/dama/lebesgue.ma
@@ -21,10 +21,11 @@ lemma order_converges_bigger_lowsegment:
    ∀a:sequence C.∀l,u:C.∀H:∀i:nat.a i ∈ [l,u]. 
      ∀x:C.∀p:a order_converges x. 
        ∀j.l ≤ (fst p) j.
-intros; cases p; clear p; simplify; cases H1; clear H1; cases H2; clear H2;
-cases (H3 j); clear H3; cases H2; cases H7; clear H2 H7;
-intro H2; cases (H8 ? H2);
-cases (H (w1+j)); apply (H12 H7);
+intros; cases p (xi yi Ux Dy Hxy); clear p; simplify; 
+cases Ux (Ixi Sxi); clear Ux; cases Dy (Dyi Iyi); clear Dy;
+cases (Hxy j) (Ia Sa); clear Hxy; cases Ia (Da SSa); cases Sa (Inca SIa); clear Ia Sa;
+intro H2; cases (SSa ? H2) (w Hw); simplify in Hw;
+cases (H (w+j)) (Hal Hau); apply (Hau Hw);
 qed.   
 
 lemma order_converges_smaller_upsegment: