From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Fri, 30 May 2003 15:20:28 +0000 (+0000)
Subject: ...
X-Git-Tag: submitted~3
X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=commitdiff_plain;h=94d22c3c285724d0e337f26fb04885d90d4f7c96

...
---

diff --git a/helm/papers/calculemus-2003/hbugs-calculemus-2003.tex b/helm/papers/calculemus-2003/hbugs-calculemus-2003.tex
index 945740cf8..b79b81a74 100644
--- a/helm/papers/calculemus-2003/hbugs-calculemus-2003.tex
+++ b/helm/papers/calculemus-2003/hbugs-calculemus-2003.tex
@@ -301,7 +301,7 @@ with the scalar.
 The user proceeds by istantiating the scalar with the number 2. The
 \texttt{Assumption} tutor now suggests to close the second goal by applying
 the hypothesis $H$. No useful suggestions, instead, are generated for the
-main goal $2x = 2*\frac{((x+1)*(x+1)-1-x*x)}{2}$.
+main goal $2x = 2*((x+1)*(x+1)-1-x*x)*2^{-1}$.
 To proceed in the proof, indeed, the user needs to symplify the
 expression using the lemma $Rinv\_r\_simpl\_m$ that states that
 $\forall x,y.\;y = x * y * x^{-1}$. Since we do not provide yet any tutor